Dyfyniad APA

BLIJ, H. J. (1974). Essentials of geography: Regions and concepts. John Wiley and Sons.

Dyfyniad Arddull Chicago

BLIJ, Harm J. Essentials of Geography: Regions and Concepts. New York: John Wiley and Sons, 1974.

Dyfyniad MLA

BLIJ, Harm J. Essentials of Geography: Regions and Concepts. John Wiley and Sons, 1974.

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