Aji, P. B. (2017). The cognitive levels of questions embedded in the Islamic education textbooks for Malaysian secondary schools: Analysis based on Bloom's taxonomy. Kulliyyah of Education, International Islamic University Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Aji, Putranto Bayu. The Cognitive Levels of Questions Embedded in the Islamic Education Textbooks for Malaysian Secondary Schools: Analysis Based on Bloom's Taxonomy. Kuala Lumpur: Kulliyyah of Education, International Islamic University Malaysia, 2017.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Aji, Putranto Bayu. The Cognitive Levels of Questions Embedded in the Islamic Education Textbooks for Malaysian Secondary Schools: Analysis Based on Bloom's Taxonomy. Kulliyyah of Education, International Islamic University Malaysia, 2017.