AKKAD, A. M. A. (1978). Kecermelangan Khalifah Umar bin Khattab. Bulan Bintang.
Chicago Style (17th ed.) CitationAKKAD, Abbas Mahmoud Al'. Kecermelangan Khalifah Umar Bin Khattab. Bulan Bintang, 1978.
MLA (8th ed.) CitationAKKAD, Abbas Mahmoud Al'. Kecermelangan Khalifah Umar Bin Khattab. Bulan Bintang, 1978.
Warning: These citations may not always be 100% accurate.