Gaya APA

MW, S, S, B. (2002). Sahabat Rasullulah SAW. Khalifah Umar bin Khattab . Bandung: PT Remaja Rosdakarya.

Gaya MLA

MW, Savitri, Sri, Bharata. "Sahabat Rasullulah SAW. Khalifah Umar bin Khattab". Bandung: PT Remaja Rosdakarya, 2002. Text.