Almas, H. M., & Hackett, J. (1983). Investigation of opinions and performance regarding physics instructional procedures in Saudi secondary schools. University of Northern Colorado,College of Arts and Science, Department of Science Education.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Almas, Hassan Mahmoud, و Jay Hackett. Investigation of Opinions and Performance Regarding Physics Instructional Procedures in Saudi Secondary Schools. Colorado: University of Northern Colorado,College of Arts and Science, Department of Science Education, 1983.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Almas, Hassan Mahmoud, و Jay Hackett. Investigation of Opinions and Performance Regarding Physics Instructional Procedures in Saudi Secondary Schools. University of Northern Colorado,College of Arts and Science, Department of Science Education, 1983.