Martin, G. J., & James, P. W. (1993). All possible worlds: A history of geographical ideas (3rd ed.). Wiley.
Chicago Style (17. basım) AtıfMartin, Geoffrey J., ve Preston W. James. All Possible Worlds: A History of Geographical Ideas. 3rd ed. New York: Wiley, 1993.
MLA (9th ed.) AtıfMartin, Geoffrey J., ve Preston W. James. All Possible Worlds: A History of Geographical Ideas. 3rd ed. Wiley, 1993.
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