Khera,S S. (1979). Oil: Rich man poor man. National Publishing House.
Dyfyniad Arddull ChicagoKhera,S S. Oil: Rich Man Poor Man. New Delhi: National Publishing House, 1979.
Dyfyniad MLAKhera,S S. Oil: Rich Man Poor Man. National Publishing House, 1979.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.