Chang, K. (2006). Introduction to geographic information systems (3rd ed.). McGraw-Hill Higher Education.
Chicago-referens (17:e uppl.)Chang, Kang-Tsung. Introduction to Geographic Information Systems. 3rd ed. Boston: McGraw-Hill Higher Education, 2006.
MLA-referens (9:e uppl.)Chang, Kang-Tsung. Introduction to Geographic Information Systems. 3rd ed. McGraw-Hill Higher Education, 2006.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.