APA (7th ed.) Zitazioa

Dunbar, C. O. (1957). Principles pf Stratigraphy (1st.). John Wiley & Sons, INC.

Chicago Style (17th ed.) Zitazioa

Dunbar, Carl O. Principles Pf Stratigraphy. 1st. New York: John Wiley & Sons, INC, 1957.

MLA (9th ed.) Zitazioa

Dunbar, Carl O. Principles Pf Stratigraphy. 1st. John Wiley & Sons, INC, 1957.