Cita APA (7th ed.)

Gale Group & Kemp, K. K. (2008). Encyclopedia of geographic information science. Sage Publications.

Cita Chicago (17th ed.)

Gale Group i Karen K. Kemp. Encyclopedia of Geographic Information Science. Thousand Oaks, California: Sage Publications, 2008.

Cita MLA (9th ed.)

Gale Group i Karen K. Kemp. Encyclopedia of Geographic Information Science. Sage Publications, 2008.