Dyfyniad APA

(1973). The exploration for and exploitation of crude oil and natural gas. Paris: OECD.

Dyfyniad Arddull Chicago

The Exploration for and Exploitation of Crude Oil and Natural Gas. Paris: OECD, 1973.

Dyfyniad MLA

The Exploration for and Exploitation of Crude Oil and Natural Gas. Paris: OECD, 1973.

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