Naber, T., Blackwell, A., & johnstone, M. (2003). English knowhow: Student book Opener. New York: Oxford University Press.
Dyfyniad Arddull ChicagoNaber, Therese, Angela Blackwell, và Michelle johnstone. English Knowhow: Student Book Opener. New York: Oxford University Press, 2003.
Dyfyniad MLANaber, Therese, Angela Blackwell, và Michelle johnstone. English Knowhow: Student Book Opener. New York: Oxford University Press, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.