APA Style
Khalid, K, M. (2014).
Biografi Khalifah Rasulullah : Abu Bakar, Umar, Utsman, Ali & Umar bin Abdul Aziz .
Jakarta:
UMMUL QURA.
MLA Style
Khalid, Khalid, Muhammad.
"Biografi Khalifah Rasulullah : Abu Bakar, Umar, Utsman, Ali & Umar bin Abdul Aziz".
Jakarta:
UMMUL QURA,
2014.
Text.