(2007). Business one: one: Student's book. Oxford: Oxford University Press.
Dyfyniad Arddull ChicagoBusiness One: One: Student's Book. Oxford: Oxford University Press, 2007.
Dyfyniad MLABusiness One: One: Student's Book. Oxford: Oxford University Press, 2007.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.