Which information should be included in a citation?

In general, a citation should include the following information:

1. Author(s) of the source
2. Title of the source
3. Date of publication
4. Publisher (if applicable)
5. Place of publication (if applicable)
6. Page numbers (if referring to a specific page or section)
7. URL or DOI (for online sources)
8. Access date (for online sources)

The specific format for citing this information may vary depending on the citation style being used (such as APA, MLA, Chicago, etc.). It is important to follow the guidelines of the specific citation style being used to ensure correct formatting.