Why references are important
How to add them
Citations the easy way
Review of what you've learned
Wikipedia articles require reliable, published sources that directly support the information presented in the article. Now you know how to add sources to an article, but which sources should you use?
The word "source" in Wikipedia has three meanings: the work itself (for example, a document, article, paper, or book), the creator of the work (for example, the writer), and the publisher of the work (for example, Cambridge University Press). All three can affect reliability.
As a general rule, more reliable sources have more people engaged in checking facts, analyzing legal issues, and scrutinizing the writing in a publication. Academic and peer-reviewed publications are usually the most reliable sources. Other reliable sources include university textbooks, books published by respected publishing houses, magazines, journals, and mainstream newspapers. (Be aware that some news organisations and magazines, such as CNN's
Whether a source is usable also depends on context. Sources that are reliable for some material are not reliable for other material. You should always try to find the best possible source for the information you have. For information about
These are general guidelines, but the topic of reliable sources is a complicated one, and is impossible to fully cover here. You can find more information at