Withrow, J. (1987). Effective writing: Writing skills for intermediate students of American English : student's book. Cambridge University Press.
Dyfyniad Arddull ChicagoWithrow, Jean. Effective Writing: Writing Skills for Intermediate Students of American English : Student's Book. Cambridge [Cambridgeshire] ; New York: Cambridge University Press, 1987.
Dyfyniad MLAWithrow, Jean. Effective Writing: Writing Skills for Intermediate Students of American English : Student's Book. Cambridge University Press, 1987.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.