Chang, K. (2008). Introduction to geographic information systems (4th ed.). McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Chang, Kang-Tsung. Introduction to Geographic Information Systems. 4th ed. Boston ; New Delhi: McGraw-Hill, 2008.
Lua MLA (8ú heag.)Chang, Kang-Tsung. Introduction to Geographic Information Systems. 4th ed. McGraw-Hill, 2008.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.