Dyfyniad APA

(1988). Geography Regions And Concepts/ Harm J. De Blij And Peter O. Muller. John Willey & Sons.

Dyfyniad Arddull Chicago

Geography Regions And Concepts/ Harm J. De Blij And Peter O. Muller. John Willey & Sons, 1988.

Dyfyniad MLA

Geography Regions And Concepts/ Harm J. De Blij And Peter O. Muller. John Willey & Sons, 1988.

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