How to Find Credible Sources

Your professor just commented on your draft: “This is not a credible source.” It’s a common problem. A research paper is only as strong as its sources. Using weak, biased, or non-academic sources is the fastest way to a low grade.

This guide is your resource for how to find credible sources. We teach what academic sources are, where to find them, and how to evaluate them.

A good source is the foundation of a good argument. This process is essential for maintaining academic integrity.

What is a Credible Source?

A credible source is an article, book, or report written by an expert with no conflict of interest. In academics, this almost always means peer-reviewed, scholarly sources. This differs from a blog, tweet, or .com website.

Peer Review: The Gold Standard

The gold standard for credibility is peer review. As research explains, this is a system where, before an article is published, it is sent to other field experts. These anonymous “peers” review the methodology, data, and conclusions. They check for errors and bias. If a source is peer-reviewed, you can trust it is accurate.

Primary vs. Secondary Sources

You must also know the source type you need:

• Primary Sources: Raw, original data or “first-hand” accounts. Examples: Diaries, letters, interviews, raw survey data, historical documents (like the Constitution).
• Secondary Sources: Analysis or interpretation of primary sources. Examples: Textbooks, journal articles, and scholarly books that *analyze* a historical event or experiment.

Most research papers use a mix of both.

How to Find Credible Sources (5 Steps)

Do not just “Google it.” Follow this process to find sources your professor will accept.

Your university library is your best tool. It provides free access to academic databases (like JSTOR, ProQuest, and Scopus) that are hidden behind paywalls. This is where academic research lives.

For a broader search, use Google Scholar, not regular Google. It only searches academic articles, books, and patents. Use “Boolean Operators” to narrow your search:

• Use “quotes” to search for an exact phrase: "social media"
• Use AND to require two terms: "social media" AND "anxiety"
• Use OR to find synonyms: ("anxiety" OR "mental health")

You must evaluate every source. The CRAAP Test is a checklist used by librarians to determine credibility. It stands for Currency, Relevance, Authority, Accuracy, and Purpose.

This is a pro research trick. When you find one *perfect* article, go to its bibliography. That list is a collection of credible sources on your topic. Read them. This “citation chaining” is the fastest way to become an expert.

A New York Times article is a good source, but not an academic one. It is a tertiary source. Use it for context, but use peer-reviewed sources for core arguments.

The CRAAP Test Explained

Use these 5 questions to evaluate sources.

Sources to Avoid (Red Flags)

Not all sources are equal. Be wary of these.

• Wikipedia: Do not cite Wikipedia. Do use the “References” section at the bottom of a Wikipedia article to find the *real* academic sources.
• Personal Blogs & Forums: These are opinions, not evidence.
• Advocacy & Political Sites: These sources have a clear bias. Their goal is to persuade, not inform.
• Sources with No Author: If no one claims it, you can’t trust it.
• Sources with No Citations: If they don’t show their work, you can’t verify their claims.