Langan, J. (2008). English Essential. What every College Student Needs to Know about Grammar, Punctuation, and Usage. Mcgaw - Hill.
استشهاد بنمط شيكاغوLangan, John. English Essential. What Every College Student Needs to Know About Grammar, Punctuation, and Usage. Mcgaw - Hill, 2008.
MLA استشهادLangan, John. English Essential. What Every College Student Needs to Know About Grammar, Punctuation, and Usage. Mcgaw - Hill, 2008.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.