Cita APA (7a ed.)

Strahler, A. N. (1970). Introduction to physical geography (2nd ed.). John Wiley & sons.

Cita Chicago Style (17a ed.)

Strahler, Arthur N. Introduction to Physical Geography. 2nd ed. New York [etc.]: John Wiley & sons, 1970.

Cita MLA (9a ed.)

Strahler, Arthur N. Introduction to Physical Geography. 2nd ed. John Wiley & sons, 1970.