Petzinger, T. (1970). The voices of oil and honor. Paris: Berkley.
Dyfyniad Arddull ChicagoPetzinger, Thomas. The Voices of Oil and Honor. Paris: Berkley, 1970.
Dyfyniad MLAPetzinger, Thomas. The Voices of Oil and Honor. Paris: Berkley, 1970.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.