APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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