APA (7th ed.) Zitazioa

Dyer, J. R. (1994). A History of the earth. Pravesh Books International.

Chicago Style (17th ed.) Zitazioa

Dyer, John R. A History of the Earth. New Delhi: Pravesh Books International, 1994.

MLA (9th ed.) Zitazioa

Dyer, John R. A History of the Earth. Pravesh Books International, 1994.