Dyfyniad APA

Chang, K. (2002). Introduction to geographic information systems [ada CD]. McGraw-Hill.

Dyfyniad Arddull Chicago

Chang, Kang-tsung. Introduction to Geographic Information Systems [ada CD]. McGraw-Hill, 2002.

Dyfyniad MLA

Chang, Kang-tsung. Introduction to Geographic Information Systems [ada CD]. McGraw-Hill, 2002.

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