Al-Goaib, S. M., & Sites, E. (1991). The influence of school activities on the students' needs fulfillment and their moral development at school: An exploratory study of the intermediate stage of the Saudi Arabian public school system. University of Pittsburgh.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Al-Goaib, Saad Mosfer, و Edward Sites. The Influence of School Activities on the Students' Needs Fulfillment and Their Moral Development at School: An Exploratory Study of the Intermediate Stage of the Saudi Arabian Public School System. Pittsburgh: University of Pittsburgh, 1991.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Al-Goaib, Saad Mosfer, و Edward Sites. The Influence of School Activities on the Students' Needs Fulfillment and Their Moral Development at School: An Exploratory Study of the Intermediate Stage of the Saudi Arabian Public School System. University of Pittsburgh, 1991.