Gaya APA

Savitri, S, B, M. (1993). Sahabat Rasulullah SAW Khalifah Umar bin Khattab . : Remadja Rosdakarya.

Gaya MLA

Savitri, Sri, Bharata, MW.,. "Sahabat Rasulullah SAW Khalifah Umar bin Khattab". : Remadja Rosdakarya, 1993. Text.