APA (7e ed.) Bronvermelding

Campbell, J., & Shin, M. (2011). Essentials of Geographic Information Systems. Saylor Foundation.

Chicago (17e ed.) Bronvermelding

Campbell, Jonathan, en MIchael Shin. Essentials of Geographic Information Systems. [Place of publication not identified]: Saylor Foundation, 2011.

MLA (9e ed.) Bronvermelding

Campbell, Jonathan, en MIchael Shin. Essentials of Geographic Information Systems. Saylor Foundation, 2011.