Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

James, Preston Everett, i Geoffrey J. Martin. All Possible Worlds: A History of Geographical Ideas. 2nd ed. New York: John Wiley & Sons, 1981.

Cita MLA (9th ed.)

James, Preston Everett, i Geoffrey J. Martin. All Possible Worlds: A History of Geographical Ideas. 2nd ed. John Wiley & Sons, 1981.