Chang, K. (2014). Introduction to Geographic Information Systems-with CD (4 th.). McGraw Hill Eduction Pvt. Ltd.
Lua i Stíl Chicago (17ú heag.)Chang, Kang-tsung. Introduction to Geographic Information Systems-with CD. 4 th. New Delhi: McGraw Hill Eduction Pvt. Ltd, 2014.
Lua MLA (9ú heag.)Chang, Kang-tsung. Introduction to Geographic Information Systems-with CD. 4 th. McGraw Hill Eduction Pvt. Ltd, 2014.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.