Al-Wattban, M. (2001). Proportional Reasoning and Working Memory Capcity Among Saudi Adolescents: A Neo-Piagetian Investigation. University Northern Colorado, College of Education, Department of Educational Psychology.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Al-Wattban, Muhammad. Proportional Reasoning and Working Memory Capcity Among Saudi Adolescents: A Neo-Piagetian Investigation. U S A: University Northern Colorado, College of Education, Department of Educational Psychology, 2001.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Al-Wattban, Muhammad. Proportional Reasoning and Working Memory Capcity Among Saudi Adolescents: A Neo-Piagetian Investigation. University Northern Colorado, College of Education, Department of Educational Psychology, 2001.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.