Gaya APA
Sabil, E., Karim, I.
(2018).
Umar Ibn Al-Khaththab
.
Bandung:
Safina.
Gaya MLA
Sabil, El., Karim, Ibnu.
"Umar Ibn Al-Khaththab".
Bandung:
Safina,
2018.
Text.