Cita APA (7a ed.)

Tang, W. (2005). Spatial portals: Gateways to geographic information. ESRI Press.

Cita Chicago Style (17a ed.)

Tang, Winnie. Spatial Portals: Gateways to Geographic Information. Redlands, California: ESRI Press, 2005.

Cita MLA (9a ed.)

Tang, Winnie. Spatial Portals: Gateways to Geographic Information. ESRI Press, 2005.