Withrow, J. (1987). Effective Writing: Writing Skills for Intermediate Students of American English; Student"s Book. Cambridge: Cambridge University.
استشهاد بنمط شيكاغوWithrow, Jean. Effective Writing: Writing Skills for Intermediate Students of American English; Student"s Book. Cambridge: Cambridge University, 1987.
MLA استشهادWithrow, Jean. Effective Writing: Writing Skills for Intermediate Students of American English; Student"s Book. Cambridge: Cambridge University, 1987.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.