Dyfyniad APA

CPRE. (1997). water a book of facts and activities.

Dyfyniad Arddull Chicago

CPRE. Water a Book of Facts and Activities. Chennai, C P R Environmental Education Centre, 1997.

Dyfyniad MLA

CPRE. Water a Book of Facts and Activities. 1997.

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