APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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