Dyfyniad APA

Unwin, D. (1985). Computer programming for geographers.

Dyfyniad Arddull Chicago

Unwin, D. Computer Programming for Geographers. Longman, 1985.

Dyfyniad MLA

Unwin, D. Computer Programming for Geographers. 1985.

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