Dyfyniad APA

WHALEN, B. (1981). Workbook for a primer of oilwell service and workover. Association of oilwell servicing contractors.

Dyfyniad Arddull Chicago

WHALEN, Bruce. Workbook for a Primer of Oilwell Service and Workover. Association of oilwell servicing contractors, 1981.

Dyfyniad MLA

WHALEN, Bruce. Workbook for a Primer of Oilwell Service and Workover. Association of oilwell servicing contractors, 1981.

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