(1986). Headway teacher's book: Intermediate. New York: Oxford University Press.
Dyfyniad Arddull ChicagoHeadway Teacher's Book: Intermediate. New York: Oxford University Press, 1986.
Dyfyniad MLAHeadway Teacher's Book: Intermediate. New York: Oxford University Press, 1986.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.