Grant, D. (2005). Business focus: Elementary student's book. Oxford: Oxford University Press.
Dyfyniad Arddull ChicagoGrant, David. Business Focus: Elementary Student's Book. Oxford: Oxford University Press, 2005.
Dyfyniad MLAGrant, David. Business Focus: Elementary Student's Book. Oxford: Oxford University Press, 2005.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.