Dyfyniad APA

Denby, E., & Swadkin, C. (1975). Sources of energy. Tyndall.

Dyfyniad Arddull Chicago

Denby, Erica, and Chris Swadkin. Sources of Energy. [Brighton]: Tyndall, 1975.

Dyfyniad MLA

Denby, Erica, and Chris Swadkin. Sources of Energy. Tyndall, 1975.

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