Cita APA (7th ed.)

Environmental Systems Research Institute (Redlands, Calif.). (2004). ArcGIS 9: What is ArcGIS? ESRI.

Cita Chicago (17th ed.)

Environmental Systems Research Institute (Redlands, Calif.). ArcGIS 9: What Is ArcGIS? Redlands, CA: ESRI, 2004.

Cita MLA (9th ed.)

Environmental Systems Research Institute (Redlands, Calif.). ArcGIS 9: What Is ArcGIS? ESRI, 2004.