APA (7th ed.) Citation

Petersen, J. F., Sack, D., & Gabler, B. (2022). Physical geography (12th edition.). Cengage.

Chicago Style (17th ed.) Citation

Petersen, James F., Dorothy Sack, and Bob Gabler. Physical Geography. 12th edition. Boston, MA: Cengage, 2022.

MLA (9th ed.) Citation

Petersen, James F., et al. Physical Geography. 12th edition. Cengage, 2022.