Dyfyniad APA

Tatsch, J. H. (1974). Petroleum deposits: Evolution and present characteristics.

Dyfyniad Arddull Chicago

Tatsch, J H. Petroleum Deposits: Evolution and Present Characteristics. Massachuset, 1974.

Dyfyniad MLA

Tatsch, J H. Petroleum Deposits: Evolution and Present Characteristics. 1974.

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