Dyfyniad APA

Chang, K. s. (2006). Introduction to geographic information systems. Boston: McGraw- Hill.

Dyfyniad Arddull Chicago

Chang, Kang- stung. Introduction to Geographic Information Systems. Boston: McGraw- Hill, 2006.

Dyfyniad MLA

Chang, Kang- stung. Introduction to Geographic Information Systems. Boston: McGraw- Hill, 2006.

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