Gaya APA

Neteler, M., Mitasova, H. (2008). Open source GIS : a grass GIS approach (3rd.ed.). New York: Springer.

Gaya MLA

Neteler, Markus., Mitasova, Helena. "Open source GIS : a grass GIS approach". 3rd.ed. New York: Springer, 2008. Teks.