Cita APA

Harder, C., Ormsby, T., & Balstrom, T. (2011). Understanding GIS: An ArcGIS project workbook (1. edition.). Redlands, California: Esri Press.

Citación estilo Chicago

Harder, Christian, Tim Ormsby, y Thomas Balstrom. Understanding GIS: An ArcGIS Project Workbook. 1. edition. Redlands, California: Esri Press, 2011.

Cita MLA

Harder, Christian, Tim Ormsby, y Thomas Balstrom. Understanding GIS: An ArcGIS Project Workbook. 1. edition. Redlands, California: Esri Press, 2011.