APA (7th ed.) Zitazioa

LONGWELL, C. R. (1962). Introduction to physical geology. John Wiley.

Chicago Style (17th ed.) Zitazioa

LONGWELL, Chester R. Introduction to Physical Geology. New York: John Wiley, 1962.

MLA (9th ed.) Zitazioa

LONGWELL, Chester R. Introduction to Physical Geology. John Wiley, 1962.