Al-Braik, M. S., & Fagan, E. R. (1986). Investigation of the successful attributes of English as a second language of Saudi Arabian students studying in the United States of America. Pennsylvania State University.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Al-Braik, Mubarak Salem, و Edward R. Fagan. Investigation of the Successful Attributes of English as a Second Language of Saudi Arabian Students Studying in the United States of America. Pennsylvania: Pennsylvania State University, 1986.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Al-Braik, Mubarak Salem, و Edward R. Fagan. Investigation of the Successful Attributes of English as a Second Language of Saudi Arabian Students Studying in the United States of America. Pennsylvania State University, 1986.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.