Cita APA (7th ed.)

James, P. E., & Martin, g. . J. (1981). All possible worlds: A history of geographical ideas (2nd ed.). Wiley.

Cita Chicago (17th ed.)

James, Preston E., i geoffrey J. Martin. All Possible Worlds: A History of Geographical Ideas. 2nd ed. New York: Wiley, 1981.

Cita MLA (9th ed.)

James, Preston E., i geoffrey J. Martin. All Possible Worlds: A History of Geographical Ideas. 2nd ed. Wiley, 1981.