O'Neil-Henry. Mastering the Marketplace. University of Nebraska Press.
Dyfyniad Arddull ChicagoO'Neil-Henry. Mastering the Marketplace. University of Nebraska Press.
Dyfyniad MLAO'Neil-Henry. Mastering the Marketplace. University of Nebraska Press.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.