Soars, L., & Soars, J. (2001). American Headway: Student book 1. New York: Oxford University Press.
Dyfyniad Arddull ChicagoSoars, Liz, và John Soars. American Headway: Student Book 1. New York: Oxford University Press, 2001.
Dyfyniad MLASoars, Liz, và John Soars. American Headway: Student Book 1. New York: Oxford University Press, 2001.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.