Dyfyniad APA

BLIJ, H. J. D., & MULLER, P. O. (1988). Geography: Regions and concepts.-- Ed.5. John Wiley and Sons.

Dyfyniad Arddull Chicago

BLIJ, Harm J. De, and Peter O. MULLER. Geography: Regions and Concepts.-- Ed.5. New York: John Wiley and Sons, 1988.

Dyfyniad MLA

BLIJ, Harm J. De, and Peter O. MULLER. Geography: Regions and Concepts.-- Ed.5. John Wiley and Sons, 1988.

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