APA (7th ed.) Citation

Allen, D. W. (2011). GIS tutorial 2. David W. Allen (Rev. ed.). ESRI.

Chicago Style (17th ed.) Citation

Allen, David W. GIS Tutorial 2. David W. Allen. Rev. ed. Redlands, Calif.: ESRI, 2011.

MLA (9th ed.) Citation

Allen, David W. GIS Tutorial 2. David W. Allen. Rev. ed. ESRI, 2011.

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