Shiyou jixie | Editorial Office of China Petroleum Machinery. Cambridge University Press.
Dyfyniad Arddull ChicagoShiyou Jixie | Editorial Office of China Petroleum Machinery. Cambridge University Press.
Dyfyniad MLAShiyou Jixie | Editorial Office of China Petroleum Machinery. Cambridge University Press.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.