APA (7th ed.) Zitazioa

Bernhardsen, T. (2014). Geographic Information Systems: An introduction. Wiley.

Chicago Style (17th ed.) Zitazioa

Bernhardsen, Tor. Geographic Information Systems: An Introduction. New Delhi: Wiley, 2014.

MLA (9th ed.) Zitazioa

Bernhardsen, Tor. Geographic Information Systems: An Introduction. Wiley, 2014.