Langan, J. (2003). Ten Skill You Really Need to Succeed in College. McGraw - HillCompanies, Inc.
استشهاد بنمط شيكاغوLangan, John. Ten Skill You Really Need to Succeed in College. McGraw - HillCompanies, Inc, 2003.
MLA استشهادLangan, John. Ten Skill You Really Need to Succeed in College. McGraw - HillCompanies, Inc, 2003.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.