APA (7th ed.) Citation

Strahler, A. H., & Strahler, A. N. (2016). Introducing physical geography (6th ed.). John Wiley & Sons.

Chicago Style (17th ed.) Citation

Strahler, Alan H., and Arthur N. Strahler. Introducing Physical Geography. 6th ed. Hoboken, NJ: John Wiley & Sons, 2016.

MLA (9th ed.) Citation

Strahler, Alan H., and Arthur N. Strahler. Introducing Physical Geography. 6th ed. John Wiley & Sons, 2016.