Dyfyniad APA

Gibney, F. (1979). Energy the fuel of life. New York: Bantam Books.

Dyfyniad Arddull Chicago

Gibney, Frank. Energy the Fuel of Life. New York: Bantam Books, 1979.

Dyfyniad MLA

Gibney, Frank. Energy the Fuel of Life. New York: Bantam Books, 1979.

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