(2002). Business: The ultimate resource. Bloomsbury.
Dyfyniad Arddull ChicagoBusiness: The Ultimate Resource. London: Bloomsbury, 2002.
Dyfyniad MLABusiness: The Ultimate Resource. Bloomsbury, 2002.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.