APA (7e ed.) Bronvermelding

Clarke, K. C. (2003). Getting started with geographic information systems (4th ed.). Pearson Education.

Chicago (17e ed.) Bronvermelding

Clarke, Keith C. Getting Started with Geographic Information Systems. 4th ed. Upper Saddle River, N.J: Pearson Education, 2003.

MLA (9e ed.) Bronvermelding

Clarke, Keith C. Getting Started with Geographic Information Systems. 4th ed. Pearson Education, 2003.