Cita APA (7th ed.)

Strahler, A. H., & Strahler, A. N. (1992). Modern physical geography (4th ed.). Wiley.

Cita Chicago (17th ed.)

Strahler, Alan H., i Arthur N. Strahler. Modern Physical Geography. 4th ed. New York: Wiley, 1992.

Cita MLA (9th ed.)

Strahler, Alan H., i Arthur N. Strahler. Modern Physical Geography. 4th ed. Wiley, 1992.