Erhijakpor, P. S. O. (2016). Profiles of success: A phenomenological study of successful PhD graduates. Kulliyyah of Education, International Islamic University Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Erhijakpor, Perkins Shuaibu Orghenenyerhovwo. Profiles of Success: A Phenomenological Study of Successful PhD Graduates. Kuala Lumpur: Kulliyyah of Education, International Islamic University Malaysia, 2016.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Erhijakpor, Perkins Shuaibu Orghenenyerhovwo. Profiles of Success: A Phenomenological Study of Successful PhD Graduates. Kulliyyah of Education, International Islamic University Malaysia, 2016.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.