Dyfyniad APA

Cotts, N. (2009). Global warming and you. Alpha House.

Dyfyniad Arddull Chicago

Cotts, Nat. Global Warming and You. New York: Alpha House, 2009.

Dyfyniad MLA

Cotts, Nat. Global Warming and You. Alpha House, 2009.

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