Dyfyniad APA

Selley, R. C. (1998). Elements of petroleum geology (2nd ed.). Academic Press.

Dyfyniad Arddull Chicago

Selley, Richard C. Elements of Petroleum Geology. 2nd ed. San Diego: Academic Press, 1998.

Dyfyniad MLA

Selley, Richard C. Elements of Petroleum Geology. 2nd ed. Academic Press, 1998.

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