Gaya APA

Muhammad, Q, I., Tartilah, T, D, F, U. (2002). Kebijakan ekonomi Umar Bin Khattab . Jakarta: Pustaka Azzam.

Gaya MLA

Muhammad, Quthb, Ibrahim., Tartilah, Titi, Dan, Fahmi,, Ummu.. "Kebijakan ekonomi Umar Bin Khattab". Jakarta: Pustaka Azzam, 2002. Text.