Dyfyniad APA

Oil and gas investor this week. Houston, Tex.: Hart Energy Pub.

Dyfyniad Arddull Chicago

Oil and Gas Investor This Week. Houston, Tex.: Hart Energy Pub.

Dyfyniad MLA

Oil and Gas Investor This Week. Houston, Tex.: Hart Energy Pub.

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