Books

1. One author

source map

2. Two or more authors

3. Organization as author

4. Book prepared by editor(s)

5. Section of a book with an editor

6. Chapter of a book

7. Paper or abstract in conference proceedings

Periodicals

8. Article in a journal

9. Article in a weekly journal

10. Article in a magazine

11. Article in a newspaper

Digital sources

12. Material from an online database

source map

13. Article in an online journal

14. Article in an online newspaper

15. Online book

16. Web site

17. Government Web site