Dyfyniad APA

Oliver, H. P. H. (1967). Petroleum. Published for the Nuffield Foundation by the Longmans/Penguin Books.

Dyfyniad Arddull Chicago

Oliver, H. P. H. Petroleum. London: Published for the Nuffield Foundation by the Longmans/Penguin Books, 1967.

Dyfyniad MLA

Oliver, H. P. H. Petroleum. Published for the Nuffield Foundation by the Longmans/Penguin Books, 1967.

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