Withrow, J. (1987). Effective writing: Writing skills for intermediate student's of American English Student's Book. London: Cambridge Univ.
استشهاد بنمط شيكاغوWithrow, Jean. Effective Writing: Writing Skills for Intermediate Student's of American English Student's Book. London: Cambridge Univ, 1987.
MLA استشهادWithrow, Jean. Effective Writing: Writing Skills for Intermediate Student's of American English Student's Book. London: Cambridge Univ, 1987.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.