Dyfyniad APA

Parker, S. P. (1981). McGraw-Hill encyclopedia of energy (2nd ed.). McGraw-Hill Book Co..

Dyfyniad Arddull Chicago

Parker, Sybil P. McGraw-Hill Encyclopedia of Energy. 2nd ed. New York: McGraw-Hill Book Co., 1981.

Dyfyniad MLA

Parker, Sybil P. McGraw-Hill Encyclopedia of Energy. 2nd ed. McGraw-Hill Book Co., 1981.

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