Gaya APA
KHALID, K., M. (2016).
BIOGRAFI KHALIFAH RASULULLAH: ABU BAKAR, UMAR, UTSMAN, ALI & UMAR BIN ABDUL AZIZ .
Jakarta:
UMMUL QURA.
Gaya MLA
KHALID, KHALID, MUHAMMAD.
"BIOGRAFI KHALIFAH RASULULLAH: ABU BAKAR, UMAR, UTSMAN, ALI & UMAR BIN ABDUL AZIZ".
Jakarta:
UMMUL QURA,
2016.
Buku Inti.