Cita APA (7th ed.)

Harcourt, H. M. (1974). Introduction to physical geography (2nd ed.). Harcourt Brace Jovanovich.

Cita Chicago (17th ed.)

Harcourt, Henry M. Introduction to Physical Geography. 2nd ed. New York: Harcourt Brace Jovanovich, 1974.

Cita MLA (9th ed.)

Harcourt, Henry M. Introduction to Physical Geography. 2nd ed. Harcourt Brace Jovanovich, 1974.