APA (7th ed.) Citation

Harder, C., Ormsby, T., & Balstrøm, T. (2011). Understanding GIS: An ArcGIS project workbook. Esri Press.

Chicago Style (17th ed.) Citation

Harder, Christian, Tim Ormsby, and Thomas Balstrøm. Understanding GIS: An ArcGIS Project Workbook. Redlands, Calif.: Esri Press, 2011.

MLA (9th ed.) Citation

Harder, Christian, et al. Understanding GIS: An ArcGIS Project Workbook. Esri Press, 2011.