Chang, K. (2006). Introduction to geographic information systems with data set cd-rom (Third edition.). McGraw-Hill Higher Education.
Lua i Stíl Chicago (17ú heag.)Chang, Kang-Tsung. Introduction to Geographic Information Systems with Data Set Cd-rom. Third edition. Boston: McGraw-Hill Higher Education, 2006.
Lua MLA (9ú heag.)Chang, Kang-Tsung. Introduction to Geographic Information Systems with Data Set Cd-rom. Third edition. McGraw-Hill Higher Education, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.