Cita APA (7th ed.)

Martin, G. J., & James, P. W. (1993). All possible worlds: A history of geographical ideas (3rd ed.). Wiley.

Cita Chicago (17th ed.)

Martin, Geoffrey J., i Preston W. James. All Possible Worlds: A History of Geographical Ideas. 3rd ed. New York: Wiley, 1993.

Cita MLA (9th ed.)

Martin, Geoffrey J., i Preston W. James. All Possible Worlds: A History of Geographical Ideas. 3rd ed. Wiley, 1993.