Withrow, J. (1987). Effective writing: Writing skills for intermediate students of American English : student's book. Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Withrow, Jean. Effective Writing: Writing Skills for Intermediate Students of American English : Student's Book. Cambridge [Cambridgeshire] ; New York: Cambridge University Press, 1987.
Lua MLA (8ú heag.)Withrow, Jean. Effective Writing: Writing Skills for Intermediate Students of American English : Student's Book. Cambridge University Press, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.