Cita APA (7th ed.)

Strahler, A. N., & Strahler, A. H. (1983). Study guide for modern physical geography (2nd ed.). Wiley.

Cita Chicago (17th ed.)

Strahler, Arthur N., i Alan H. Strahler. Study Guide for Modern Physical Geography. 2nd ed. New York: Wiley, 1983.

Cita MLA (9th ed.)

Strahler, Arthur N., i Alan H. Strahler. Study Guide for Modern Physical Geography. 2nd ed. Wiley, 1983.