Sari, I. N. (2005). Factors contributing to grade retention among primary school children in Jakarta, Indonesia. Centre for Education and Human Development, International Islamic University Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Sari, Indah Namira. Factors Contributing to Grade Retention Among Primary School Children in Jakarta, Indonesia. Gombak: Centre for Education and Human Development, International Islamic University Malaysia, 2005.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Sari, Indah Namira. Factors Contributing to Grade Retention Among Primary School Children in Jakarta, Indonesia. Centre for Education and Human Development, International Islamic University Malaysia, 2005.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.