APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Strahler, Alan H., and Arthur Newell Strahler. Introducing Physical Geography. 2. ed. New York [u.a.]: Wiley, 1998.

MLA (9th ed.) Citation

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