APA (7th ed.) Zitazioa
Chaisson, E. (2007). Astronomy: A beginner's guide to the universe (5th ed.). Pearson/Benjamin Cummings.
Chicago Style (17th ed.) Zitazioa
Chaisson, Eric. Astronomy: A Beginner's Guide to the Universe. 5th ed. San Francisco CA: Pearson/Benjamin Cummings, 2007.
MLA (9th ed.) Zitazioa
Chaisson, Eric. Astronomy: A Beginner's Guide to the Universe. 5th ed. Pearson/Benjamin Cummings, 2007.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.