Dyfyniad APA

Heywood, I., & ...[et al.]. (2000). An introduction to geographical information systems. Addison Wesley.

Dyfyniad Arddull Chicago

Heywood, Ian, and ...[et al.]. An Introduction to Geographical Information Systems. England: Addison Wesley, 2000.

Dyfyniad MLA

Heywood, Ian, and ...[et al.]. An Introduction to Geographical Information Systems. Addison Wesley, 2000.

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