Dyfyniad APA

Price, B. P. (1975). World sources of energy. Macdonald Educational.

Dyfyniad Arddull Chicago

Price, Brian P. World Sources of Energy. London: Macdonald Educational, 1975.

Dyfyniad MLA

Price, Brian P. World Sources of Energy. Macdonald Educational, 1975.

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