Dyfyniad APA

Joseph,B. (2012). Environmental studies,2nd ed (2nd.). Tata McGrawhill.

Dyfyniad Arddull Chicago

Joseph,B. Environmental Studies,2nd Ed. 2nd. New Delhi: Tata McGrawhill, 2012.

Dyfyniad MLA

Joseph,B. Environmental Studies,2nd Ed. 2nd. Tata McGrawhill, 2012.

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