Langan, J. (2003). Ten skills you really need to succeed in college. Boston: McGraw-Hill.
استشهاد بنمط شيكاغوLangan, John. Ten Skills You Really Need to Succeed in College. Boston: McGraw-Hill, 2003.
MLA استشهادLangan, John. Ten Skills You Really Need to Succeed in College. Boston: McGraw-Hill, 2003.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.