APA (7th ed.) Zitazioa

ebrary, Inc, & Dawsen, C. J. (2011). Geographic information systems. Nova Science Publishers.

Chicago Style (17th ed.) Zitazioa

ebrary, Inc, eta Christopher J. Dawsen. Geographic Information Systems. New York: Nova Science Publishers, 2011.

MLA (9th ed.) Zitazioa

ebrary, Inc, eta Christopher J. Dawsen. Geographic Information Systems. Nova Science Publishers, 2011.