APA (7th ed.) Citation

Clemmer, G. (2013). The GIS 20: Essential skills (Second edition.). Esri Press.

Chicago Style (17th ed.) Citation

Clemmer, Gina. The GIS 20: Essential Skills. Second edition. Redlands, California: Esri Press, 2013.

MLA (9th ed.) Citation

Clemmer, Gina. The GIS 20: Essential Skills. Second edition. Esri Press, 2013.

Warning: These citations may not always be 100% accurate.