Dyfyniad APA

Stein, R. S., & Powers, J. (2011). The energy problem. World Scientific.

Dyfyniad Arddull Chicago

Stein, Richard S., and Joseph Powers. The Energy Problem. Singapore: World Scientific, 2011.

Dyfyniad MLA

Stein, Richard S., and Joseph Powers. The Energy Problem. World Scientific, 2011.

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