Gaya APA

Ash-Shallabi, A, M. (2008). Biografi Umar bin Al-Khathab . Jakarta: PUSTAKA AL-KAUTSAR.

Gaya MLA

Ash-Shallabi, Ali, Muhammad. "Biografi Umar bin Al-Khathab". Jakarta: PUSTAKA AL-KAUTSAR, 2008. Text.