APA (7th ed.) Citation

Strahler, A. H., & Strahler, A. N. (2000). Introducing physical geography (2. ed., updated and upgraded.). Wiley.

Chicago Style (17th ed.) Citation

Strahler, Alan H., and Arthur Newell Strahler. Introducing Physical Geography. 2. ed., updated and upgraded. New York [u.a.]: Wiley, 2000.

MLA (9th ed.) Citation

Strahler, Alan H., and Arthur Newell Strahler. Introducing Physical Geography. 2. ed., updated and upgraded. Wiley, 2000.