Gaya APA
Muhammad, S, ,, A., Jalil, I.
(2017).
Biografi Umar bin Khattab
(
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Jakarta:
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Gaya MLA
Muhammad, Shallabi, ,, Ali., Jalil, Ismail.
"Biografi Umar bin Khattab".
Cet. I
Jakarta:
Ummul Qura,
2017.
Text.