APA (7th ed.) Citation

Petersen, J. F., Sack, D., & Gabler, R. E. (2011). Fundamentals of Physical Geography. Brook/Cole.

Chicago Style (17th ed.) Citation

Petersen, James F., Dorothy Sack, and Robert E. Gabler. Fundamentals of Physical Geography. Brook/Cole, 2011.

MLA (8th ed.) Citation

Petersen, James F., et al. Fundamentals of Physical Geography. Brook/Cole, 2011.