APA (7th ed.) Zitazioa

Krauskopf, K. B. (1974). The third planet: An invitation to geology. Freeman.

Chicago Style (17th ed.) Zitazioa

Krauskopf, Konrad B. The Third Planet: An Invitation to Geology. San Francisco: Freeman, 1974.

MLA (9th ed.) Zitazioa

Krauskopf, Konrad B. The Third Planet: An Invitation to Geology. Freeman, 1974.