APA (7th ed.) Citation

Strahler, A. H., & Strahler, A. N. (1998). Introducing physical geography (2nd ed.). Wiley.

Chicago Style (17th ed.) Citation

Strahler, Alan H., and Arthur Newell Strahler. Introducing Physical Geography. 2nd ed. New York: Wiley, 1998.

MLA (9th ed.) Citation

Strahler, Alan H., and Arthur Newell Strahler. Introducing Physical Geography. 2nd ed. Wiley, 1998.