You probably know by now that if you cite Wikipedia as an authoritative source, the wrath of your professor shall be visited upon you.  Why is it that even the most informative Wikipedia articles are still often considered illegitimate? And what are good sources to use? The table below summarizes the types of secondary sources in four tiers. All sources have their legitimate uses, but the top-tier ones are preferable for citation.

Tier 1: Peer-reviewed academic publications

These are sources from mainstream academic literature: books and scholarly articles. Academic books generally fall into three categories: (1) textbooks written with students in mind, (2) monographs that give an extended report on a large research project, and (3) edited volumes in which each chapter is authored by different people. Scholarly articles appear in academic journals, which are published multiple times a year in order to share the latest research findings with scholars in the field. They’re usually sponsored by some academic society. To get published, these articles and books had to earn favorable anonymous evaluations by qualified scholars. Who are the experts writing, reviewing, and editing these scholarly publications? Your professors. I describe this process below. Learning how to read and use these sources is a fundamental part of being a college student.

Tier 2: Reports, articles, and books from credible non-academic sources

Some events and trends are too recent to appear in Tier 1 sources. Also, Tier 1 sources tend to be highly specific, and sometimes you need a more general perspective on a topic. Thus, Tier 2 sources can provide quality information that is more accessible to non-academics. There are three main categories. First, official reports from government agencies or major international institutions like the World Bank or the United Nations; these institutions generally have research departments staffed with qualified experts who seek to provide rigorous, even-handed information to decision-makers. Second, feature articles from major newspapers and magazines like the New York Times, Wall Street Journal, London Times, or The Economist are based on original reporting by experienced journalists (not press releases) and are typically 1500+ words in length. Third, there are some great books from non-academic presses that cite their sources; they’re often written by journalists. All three of these sources are generally well-researched descriptions of an event or state of the world, undertaken by credentialed experts who generally seek to be even-handed. It is still up to you to judge their credibility. Your instructors and campus librarians can advise you on which sources in this category have the most credibility.

Tier 3. Short pieces from periodicals or credible websites

A step below the well-developed reports and feature articles is the short tidbits that one finds in newspapers and magazines or credible websites. How short is a short news article? Usually, they’re just a couple of paragraphs or less, and they’re often reporting on just one thing: an event, an interesting research finding, or a policy change. They don’t take extensive research and analysis to write, and many just summarize a press release written and distributed by an organization or business. They may describe things like corporate mergers, newly discovered diet-health links, or important school-funding legislation. You may want to cite Tier 3 sources in your paper if they provide an important factoid or two that isn’t provided by a higher-tier piece, but if the Tier 3 article describes a particular study or academic expert, your best bet is to find the journal article or book it is reporting on and use that Tier 1 source instead. If the article mentions which journal the study was published in, you can go right to that journal through your library website. Sometimes you can find the original journal article by putting the scholar’s name and some keywords into Google Scholar.

What counts as a credible website in this tier? You may need some guidance from instructors or librarians, but you can learn a lot by examining the person or organization providing the information (look for an “About” link). For example, if the organization is agenda-driven or not up-front about its aims and/or funding sources, then it definitely isn’t something you want to cite as a neutral authority. Also, look for signs of expertise. A tidbit about a medical research finding written by someone with a science background carries more weight than the same topic written by a policy analyst. These sources are sometimes uncertain, which is all the more reason to follow the trail to a Tier 1 or Tier 2 source whenever possible.

Tier 4. Agenda-driven or pieces from unknown sources

Wikipedia is a conundrum. There are a lot of excellent articles on there and many professors embrace the open-access values that embody things like Wikipedia and this very textbook. It’s not that Wikipedia is crap; it’s just that there are much more solid alternatives. These types of sources—especially Wikipedia—can be hugely helpful in identifying interesting topics, positions within a debate, keywords to search on, and, sometimes, higher-tier sources on the topic. They often play a critically important role in the early part of the research process, but they generally aren’t (and shouldn’t be) cited in the final paper.

Throwing some keywords into Google and seeing what you get is a fine way to get started, but don’t stop there. Start a list of the people, organizations, sources, and keywords that seem most relevant to your topic.

Origins and Anatomy of a Journal Article

Most of the Tier 1 sources available are academic articles, also called scholarly articles, scholarly papers, journal articles, academic papers, or peer-reviewed articles. They all mean the same thing: a paper published in an academic periodical after being scrutinized anonymously and judged to be sound by other experts in the subfield. Their origin explains both their basic structure and the high esteem they have in the eyes of your professors.

Academic papers are essentially reports that scholars write to their peers—present and future—about what they’ve done in their research, what they’ve found, and why they think it’s important. Thus, in a lot of fields they often have a structure reminiscent of the lab reports you’ve written for science classes:

1. Abstract: A one-paragraph summary of the article: its purpose, methods, findings, and significance.
2. Introduction: An overview of the key question or problem that the paper addresses, why it is important, and the key conclusion(s) (i.e., thesis or theses) of the paper.
3. Literature review: A synthesis of all the relevant prior research (the so-called “academic literature” on the subject) that explains why the paper makes an original and important contribution to the body of knowledge.
4. Data and methods: An explanation of what data or information the author(s) used and what they did with it.
5. Results: A full explanation of the key findings of the study.
6. Conclusion/discussion: Puts the key findings or insights from the paper into their broader context; explains why they matter.

Not all papers are so “sciencey.” For example, the historical or literary analysis doesn’t necessarily have a “data and methods” section; but they do explain and justify the research question, describe how the authors’ points relate to those made in other relevant articles and books, develop the key insights yielded by the analysis, and conclude by explaining their significance. Some academic papers are review articles, in which the “data” are published papers and the “findings” are key insights, enduring lines of debate, and/or remaining unanswered questions.

Scholarly journals use a peer-review process to decide which articles merit publication. The whole process, from start to finish, can easily take a year, and it is often another year before the paper appears in print.

Understanding the academic paper and the structure of scholarly articles tells you a lot about how to find, read, and use these sources:

1. Find them quickly. Instead of paging through mountains of dubious web content, go right to the relevant scholarly article databases in order to quickly find the highest quality sources.
2. Use the abstracts. Abstracts tell you immediately whether or not the article you’re holding is relevant or useful to the paper you’re assigned to write. You shouldn’t ever have the experience of reading the whole paper just to discover it’s not useful.
3. Read strategically. Knowing the anatomy of a scholarly article tells you what you should be reading for in each section. For example, you don’t necessarily need to understand every nuance of the literature review. You can just focus on why the authors claim that their own study is distinct from the ones that came before.
4. Don’t sweat the technical stuff. Not every social scientist understands the intricacies of log-linear modeling of quantitative survey data; however, the reviewers do, and they found the analysis to be well constructed. Thus, you can accept the findings as legitimate and just focus on the passages that explain the findings and their significance in plainer language.
5. Use one article to find others. If you have one really good article that’s a few years old, you can use article databases to find newer articles that cited it in their literature reviews. That immediately tells you which ones are on the same topic and offer newer findings. On the other hand, if your first source is very recent, the literature review section will describe the other papers in the same line of research. You can look them up directly.

Students sometimes grumble when they’re ordered to use scholarly articles in their research. It seems a lot easier to just Google some terms and find stuff that way. However, academic articles are the most efficient resource out there. They are vetted by experts and structured specifically to help readers zero in on the most important passages.

Finding Tier 1 sources: article databases

Your campus library pays big money to subscribe to databases for Tier 1 articles. Some are general-purpose databases that include the most prominent journals across disciplines. You can always seek advice from librarians and other library staff on the best databases for your topic. A one-hour workshop will save you many, many hours in the future. Many libraries also have online research guides that point you to the best databases for the specific discipline and, perhaps, the specific course. Librarians are eager to help you succeed with your research—it’s their job and they love it!—so don’t be shy about asking.

An increasingly popular article database is Google Scholar. It looks like a regular Google search, and it aspires to include the vast majority of published scholarship. Google doesn’t share a list of which journals they include or how Google Scholar works, which limits its utility for scholars. Also, because it’s so wide-ranging, it can be harder to find the most appropriate sources. However, if you want to cast a wide net, it’s a very useful tool.

Here are three tips for using Google Scholar effectively:

1. Add your field (economics, psychology, French, etc.) as one of your keywords. If you just put in “crime,” for example, Google Scholar will return all sorts of stuff from sociology, psychology, geography, and history. If your paper is on crime in French literature, your best sources may be buried under thousands of papers from other disciplines. A set of search terms like “crime French literature modern” will get you to relevant sources much faster.
2. Don’t ever pay for an article. When you click on links to articles in Google Scholar, you may end up on a publisher’s site that tells you that you can download the article for $20 or $30. Don’t pay for an article! You probably have access to virtually all the published academic literature through your library resources. Write down the key information (authors’ names, title, journal title, volume, issue number, year, and page numbers) and go find the article through your library website. If you don’t have immediate full-text access, you may be able to get it through inter-library loan.
3. Use the “cited by” feature. If you get one great hit on Google Scholar, you can quickly see a list of other papers that cited it.

Library research as problem-solving

You’ll probably engage the subscription article databases at different points in the process. For example, imagine you’ve been assigned a research paper that can focus on any topic relevant to the course. Imagine further that you don’t have a clue about where to start and aren’t entirely sure what counts as an appropriate topic in this discipline. A great approach is to find the top journals in the specific field of your course and browse through recent issues to see what people are publishing.

When you have a topic and are looking for a set of sources, your biggest challenge is finding the right keywords. You’ll never find the right sources without them. You’ll start with words and phrases from the assignment prompt, but you can’t stop there. As explained above, lower-tier sources (such as Wikipedia) or the top-tier sources you already have are great for identifying alternative keywords, and librarians and other library staff are also well-practiced at finding new approaches to try. Librarians can also point you to the best databases for your topic as well.

As you assess your evidence and further develop your thesis through the writing process, you may need to seek additional sources. Your instructor may have asked you to turn in a bibliography weeks before the final paper draft. You can check with your professor, but he or she is probably perfectly fine with you seeking additional sources as your thinking evolves. That’s how scholars write.

Finding good sources is a much more creative task than it seems on the face of it. It’s an extended problem-solving exercise, an iterative cycle of questions and answers. Go ahead and use Wikipedia to get broadly informed if you want. It won’t corrupt your brain. But use it, and all other sources, strategically. You should eventually arrive at a core set of Tier 1 sources that will enable you to make a well-informed and thoughtful argument in support of your thesis. It’s also a good sign when you find yourself deciding that some of the first sources you found are no longer relevant to your thesis; that likely means that you have revised and specified your thinking and are well on your way to constructing the kind of self-driven in-depth analysis that your professor is looking for.