Cita APA (7th ed.)

Strahler, A. N. (1960). Physical geography (2a. ed.). John Wiley.

Cita Chicago (17th ed.)

Strahler, Arthur N. Physical Geography. 2a. ed. Nueva York: John Wiley, 1960.

Cita MLA (9th ed.)

Strahler, Arthur N. Physical Geography. 2a. ed. John Wiley, 1960.