Dyfyniad APA

Chang, K. (2008). Introduction to geographic information systems (4th ed.). McGraw-Hill.

Dyfyniad Arddull Chicago

Chang, Kang-Tsung. Introduction to Geographic Information Systems. 4th ed. Boston ; New Delhi: McGraw-Hill, 2008.

Dyfyniad MLA

Chang, Kang-Tsung. Introduction to Geographic Information Systems. 4th ed. McGraw-Hill, 2008.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.