Citazione Stile APA (7a Edizione)

Bernhardsen, T. (1999). Geographic information systems: An introduction (2nd ed.). Wiley.

Citazione stile Chigago Style (17a edizione)

Bernhardsen, Tor. Geographic Information Systems: An Introduction. 2nd ed. New York: Wiley, 1999.

Citatione MLA (9a ed.)

Bernhardsen, Tor. Geographic Information Systems: An Introduction. 2nd ed. Wiley, 1999.