Dyfyniad APA

McMullan, J. T. (1976). Energy resources and supply. Wiley Eastern.

Dyfyniad Arddull Chicago

McMullan, John T. Energy Resources and Supply. London: Wiley Eastern, 1976.

Dyfyniad MLA

McMullan, John T. Energy Resources and Supply. Wiley Eastern, 1976.

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