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