Al-Mazroe, H. M. H., & Hackett, J. K. (1982). A comparison between Piagetian cognitive level and physics achievement for twelfth grade students in Saudi Arabia. University of Northern Colorado,college of Arts and Science, Department of Science Education.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Al-Mazroe, Hafeez Mohamed H., و Jay K. Hackett. A Comparison Between Piagetian Cognitive Level and Physics Achievement for Twelfth Grade Students in Saudi Arabia. Colorado: University of Northern Colorado,college of Arts and Science, Department of Science Education, 1982.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Al-Mazroe, Hafeez Mohamed H., و Jay K. Hackett. A Comparison Between Piagetian Cognitive Level and Physics Achievement for Twelfth Grade Students in Saudi Arabia. University of Northern Colorado,college of Arts and Science, Department of Science Education, 1982.