APA (7th ed.) Citation

Petersen, J. F., Sack, D., & Gabler, R. E. (2015). Fundamentals of physical geography (Second edition.). Cengage Learning.

Chicago Style (17th ed.) Citation

Petersen, James F., Dorothy Sack, and Robert E. Gabler. Fundamentals of Physical Geography. Second edition. Stamford Conn: Cengage Learning, 2015.

MLA (9th ed.) Citation

Petersen, James F., et al. Fundamentals of Physical Geography. Second edition. Cengage Learning, 2015.