Dyfyniad APA

Ezra, D. (1980). Coal and Energy (2nd Ed.). Ernest Benn.

Dyfyniad Arddull Chicago

Ezra, Derek. Coal and Energy. 2nd Ed. London: Ernest Benn, 1980.

Dyfyniad MLA

Ezra, Derek. Coal and Energy. 2nd Ed. Ernest Benn, 1980.

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