APA (7th ed.) Citation

Plummer, C. C., McGeary, D., & Carlson, D. H. (1991). Physical geology (Fifth Edition.). WCB Publishers, Inc.

Chicago Style (17th ed.) Citation

Plummer, Charles C., David McGeary, and Diane H. Carlson. Physical Geology. Fifth Edition. Dubuque, IA: WCB Publishers, Inc, 1991.

MLA (9th ed.) Citation

Plummer, Charles C., et al. Physical Geology. Fifth Edition. WCB Publishers, Inc, 1991.