APA (7th ed.) Citation

Petersen, J. F., Sack, D. I., & Gabler, R. E. (2011). Fundamentals of physical geography. Brooks/Cole/Cengage Learning.

Chicago Style (17th ed.) Citation

Petersen, James F., Dorothy Irene Sack, and Robert E. Gabler. Fundamentals of Physical Geography. Belmont, California: Brooks/Cole/Cengage Learning, 2011.

MLA (9th ed.) Citation

Petersen, James F., et al. Fundamentals of Physical Geography. Brooks/Cole/Cengage Learning, 2011.