Aidid, H. A. (1956). Rangkaian tarikh Islam Khalifah Umar Bin Khatthab RA. Firma Islamiyah.
Chicago Style (17th ed.) CitationAidid, Haji Abdullah. Rangkaian Tarikh Islam Khalifah Umar Bin Khatthab RA. Firma Islamiyah, 1956.
MLA (8th ed.) CitationAidid, Haji Abdullah. Rangkaian Tarikh Islam Khalifah Umar Bin Khatthab RA. Firma Islamiyah, 1956.
Warning: These citations may not always be 100% accurate.