APA (7th ed.) Citation

Plummer, C. C. (1991). Physical geology (5th ed.). Wm. C. Brown.

Chicago Style (17th ed.) Citation

Plummer, Charles C. Physical Geology. 5th ed. Dubuque, IA: Wm. C. Brown, 1991.

MLA (9th ed.) Citation

Plummer, Charles C. Physical Geology. 5th ed. Wm. C. Brown, 1991.