Gaya APA

Khalid, K, M. (2014). Biografi Khalifah Rasulullah : Abu Bakar, Umar, Utsman, Ali, Umar, bin Abdul Aziz (Cet. 2). JAKARTA: Ummul Qura.

Gaya MLA

Khalid, Khalid, Muhammad. "Biografi Khalifah Rasulullah : Abu Bakar, Umar, Utsman, Ali, Umar, bin Abdul Aziz". Cet. 2 JAKARTA: Ummul Qura, 2014. Text.