Dyfyniad APA

Aubrecht, G. J. (2006). Energy: Physical, environmental, and social impact (3rd ed.). Prentice Hall.

Dyfyniad Arddull Chicago

Aubrecht, Gordon J. Energy: Physical, Environmental, and Social Impact. 3rd ed. Upper Saddle River, N.J: Prentice Hall, 2006.

Dyfyniad MLA

Aubrecht, Gordon J. Energy: Physical, Environmental, and Social Impact. 3rd ed. Prentice Hall, 2006.

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