Jarrah, M. A. S. (1985). A Phonological Investigation Into Some Difficulties in Spoken English Ecountered by Saudi Students. King AbdulAziz University, Faculty of Education, Department of Foreign Languages.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Jarrah, Mohamed Ali Saleh. A Phonological Investigation Into Some Difficulties in Spoken English Ecountered by Saudi Students. Madina Munawwarah, Saudi Arabia: King AbdulAziz University, Faculty of Education, Department of Foreign Languages, 1985.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Jarrah, Mohamed Ali Saleh. A Phonological Investigation Into Some Difficulties in Spoken English Ecountered by Saudi Students. King AbdulAziz University, Faculty of Education, Department of Foreign Languages, 1985.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.