Geoffrey Hirt. (1996). Study guide: Business a changing world. New York.
Dyfyniad Arddull ChicagoGeoffrey Hirt. Study Guide: Business a Changing World. New York, 1996.
Dyfyniad MLAGeoffrey Hirt. Study Guide: Business a Changing World. New York, 1996.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.