Gaya APA
Khalid, M, K. (2016).
Biografi Khalifah Rasulullah : Abu Bakar, Umar, Utsman, Ali dan Umar bin Abdul Aziz .
Jakarta:
Ummul Qura.
Gaya MLA
Khalid, Muhammad, Khalid.
"Biografi Khalifah Rasulullah : Abu Bakar, Umar, Utsman, Ali dan Umar bin Abdul Aziz".
Jakarta:
Ummul Qura,
2016.
Text.