Dyfyniad APA

McCray, A. W. (1975). Petroleum evaluations and economic decisions. Prentice-Hall.

Dyfyniad Arddull Chicago

McCray, Arthur White. Petroleum Evaluations and Economic Decisions. Englewood Cliffs, N.J.: Prentice-Hall, 1975.

Dyfyniad MLA

McCray, Arthur White. Petroleum Evaluations and Economic Decisions. Prentice-Hall, 1975.

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