Nasser, R., & Nauffal, D. (2012). Frequency of Repeated Courses Its Relation to Persistence and Performance in Lebanon's Higher Education.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Nasser, Ramzi, و Diane Nauffal. Frequency of Repeated Courses Its Relation to Persistence and Performance in Lebanon's Higher Education. 2012.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Nasser, Ramzi, و Diane Nauffal. Frequency of Repeated Courses Its Relation to Persistence and Performance in Lebanon's Higher Education. 2012.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.