Brown, G. D., & Rice, S. (2007). Professional English in use. Cambridge ; New York: Cambridge University Press.
Dyfyniad Arddull ChicagoBrown, Gillian D., và Sally Rice. Professional English in Use. Cambridge ; New York: Cambridge University Press, 2007.
Dyfyniad MLABrown, Gillian D., và Sally Rice. Professional English in Use. Cambridge ; New York: Cambridge University Press, 2007.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.