Citazione Stile APA (7a Edizione)

Martin, G. J., James, P. E., & James, E. W. (1993). All possible worlds: A history of geographical ideas. Wiley and Sons.

Citazione stile Chigago Style (17a edizione)

Martin, Geoffrey J., Preston E. James, e Eileen W. James. All Possible Worlds: A History of Geographical Ideas. New York: Wiley and Sons, 1993.

Citatione MLA (9a ed.)

Martin, Geoffrey J., et al. All Possible Worlds: A History of Geographical Ideas. Wiley and Sons, 1993.