Blackwell, A., Naber, T., & Manin, G. J. (2003). English knowhow. Oxford University Press.
Dyfyniad Arddull ChicagoBlackwell, Angela, Therese Naber, and Gregory J. Manin. English Knowhow. New York: Oxford University Press, 2003.
Dyfyniad MLABlackwell, Angela, et al. English Knowhow. Oxford University Press, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.