Dk Nur-Ashikin bte Pg Haji Petra. (2002). Problems in teaching Islamic religious knowledge: A survey on teachers' perceptions in secondary schools in Negara Brunei Darussalam. Kulliyyah of Education, International Islamic University Malaysia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Dk Nur-Ashikin bte Pg Haji Petra. Problems in Teaching Islamic Religious Knowledge: A Survey on Teachers' Perceptions in Secondary Schools in Negara Brunei Darussalam. Gombak, Selangor: Kulliyyah of Education, International Islamic University Malaysia, 2002.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Dk Nur-Ashikin bte Pg Haji Petra. Problems in Teaching Islamic Religious Knowledge: A Survey on Teachers' Perceptions in Secondary Schools in Negara Brunei Darussalam. Kulliyyah of Education, International Islamic University Malaysia, 2002.