Dyfyniad APA

(2006). Geography and environment: Issues and challenges. Concept Publishing.

Dyfyniad Arddull Chicago

Geography and Environment: Issues and Challenges. New Delhi: Concept Publishing, 2006.

Dyfyniad MLA

Geography and Environment: Issues and Challenges. Concept Publishing, 2006.

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