APA (7th ed.) Citation

Plummer, C. C. (1996). Physical geology (7. ed.). WCB.

Chicago Style (17th ed.) Citation

Plummer, Charles C. Physical Geology. 7. ed. Dubuque, Iowa <<[u.a.]>>: WCB, 1996.

MLA (9th ed.) Citation

Plummer, Charles C. Physical Geology. 7. ed. WCB, 1996.