Dyfyniad APA

Cook, E. Man, energy, society. W.H. Freeman and Company.

Dyfyniad Arddull Chicago

Cook, Earl. Man, Energy, Society. San Francisco: W.H. Freeman and Company.

Dyfyniad MLA

Cook, Earl. Man, Energy, Society. W.H. Freeman and Company.

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