Gaya APA

Khalid, K, M. et al (2014). Umar Bin Khaththab : Khalifah penegak keadilan (ed.1). Bandung: PT Mizan Pustaka.

Gaya MLA

Khalid, Khalid, Muhammad. et al. "Umar Bin Khaththab : Khalifah penegak keadilan". ed.1 Bandung: PT Mizan Pustaka, 2014. Text.