Fishman, C. (2011). The Wal-Mart effect. Penguin Group.
Dyfyniad Arddull ChicagoFishman, Charles. The Wal-Mart Effect. New York: Penguin Group, 2011.
Dyfyniad MLAFishman, Charles. The Wal-Mart Effect. Penguin Group, 2011.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.