APA (7th ed.) Citation

Martin, G. J., & Martin, T. S. (2005). All possible worlds: A history of geographical ideas (4th ed.). Oxford University Press.

Chicago Style (17th ed.) Citation

Martin, Geoffrey J., and T. S. Martin. All Possible Worlds: A History of Geographical Ideas. 4th ed. New York: Oxford University Press, 2005.

MLA (9th ed.) Citation

Martin, Geoffrey J., and T. S. Martin. All Possible Worlds: A History of Geographical Ideas. 4th ed. Oxford University Press, 2005.