Asyur, M. A. (1997). Khotbah dan pesan Umar ibn Khattab. Pustaka Firdaus.
Chicago Style (17th ed.) CitationAsyur, Muhammad Ahmad. Khotbah Dan Pesan Umar Ibn Khattab. Pustaka Firdaus, 1997.
MLA (8th ed.) CitationAsyur, Muhammad Ahmad. Khotbah Dan Pesan Umar Ibn Khattab. Pustaka Firdaus, 1997.
Warning: These citations may not always be 100% accurate.