APA (7th ed.) Citation

Strahler, A. H., & Strahler, A. N. (1996). Introducing physical geography (Environmental update.). John Wiley & Sons.

Chicago Style (17th ed.) Citation

Strahler, Alan H., and Arthur Newell Strahler. Introducing Physical Geography. Environmental update. New York: John Wiley & Sons, 1996.

MLA (9th ed.) Citation

Strahler, Alan H., and Arthur Newell Strahler. Introducing Physical Geography. Environmental update. John Wiley & Sons, 1996.