Langan, J. (2005). College writing skills and college writing skills with readings. New York: McGraw-Hill.
استشهاد بنمط شيكاغوLangan, John. College Writing Skills and College Writing Skills With Readings. New York: McGraw-Hill, 2005.
MLA استشهادLangan, John. College Writing Skills and College Writing Skills With Readings. New York: McGraw-Hill, 2005.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.