APA (7th ed.) Citation

Strahler, A. H., & Strahler, A. N. (1997). Physical geography: Science and systems of the human environment. Wiley.

Chicago Style (17th ed.) Citation

Strahler, Alan H., and Arthur Newell Strahler. Physical Geography: Science and Systems of the Human Environment. New York: Wiley, 1997.

MLA (9th ed.) Citation

Strahler, Alan H., and Arthur Newell Strahler. Physical Geography: Science and Systems of the Human Environment. Wiley, 1997.