Gaya APA

Haikal, M, H., Audah, A. (2002). Umar Bin Khattab . Bogor: Litera Antar Nusa.

Gaya MLA

Haikal, Muhammad, Husein., Audah, Ali. "Umar Bin Khattab". Bogor: Litera Antar Nusa, 2002. Elektronik/Digital.