APA (7th ed.) Zitazioa

Chaisson, E. (1993). Astronomy today. Prentice Hall.

Chicago Style (17th ed.) Zitazioa

Chaisson, Eric. Astronomy Today. New Jersey: Prentice Hall, 1993.

MLA (9th ed.) Zitazioa

Chaisson, Eric. Astronomy Today. Prentice Hall, 1993.