APA (7th ed.) Citation

Whittlesey, D. S. (1939). The earth and the state: A study of political geography. Holt.

Chicago Style (17th ed.) Citation

Whittlesey, Derwent S. The Earth and the State: A Study of Political Geography. New York: Holt, 1939.

MLA (9th ed.) Citation

Whittlesey, Derwent S. The Earth and the State: A Study of Political Geography. Holt, 1939.