Dyfyniad APA

Burrough, P. R. &. M. (2015). Principles of Geographical Information Systems (01st.). Oxford University Press.

Dyfyniad Arddull Chicago

Burrough, Peter R. & Mcdonnell. Principles of Geographical Information Systems. 01st. United Kingdom: Oxford University Press, 2015.

Dyfyniad MLA

Burrough, Peter R. & Mcdonnell. Principles of Geographical Information Systems. 01st. Oxford University Press, 2015.

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