Gaya APA

Haekal, M, H. (2008). Umar bin Khattab (1st ed.). Jakarta: PT Pustaka Litera AntarNusa.

Gaya MLA

Haekal, Muhammad, Husain. "Umar bin Khattab". 1st ed. Jakarta: PT Pustaka Litera AntarNusa, 2008. Text.