Gaya APA

Khalid, K, , M. (2016). Biografi Khalifah Rasulullah: Abu Bakar, Umar, Utsman, Ali & Umar bin Abdul Aziz (Cet. 3). Jakarta: Ummul Qura.

Gaya MLA

Khalid, Khalid, , Muhammad. "Biografi Khalifah Rasulullah: Abu Bakar, Umar, Utsman, Ali & Umar bin Abdul Aziz". Cet. 3 Jakarta: Ummul Qura, 2016. Buku.