Gaya APA
Ayyub, H.
(2003).
al-Khulafa' al Rashidin : al-Qadah al-Awfaya' wa A'zam al-Khulafa'
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Kairo:
Dar al-Salam.
Gaya MLA
Ayyub, Hasan.
"al-Khulafa' al Rashidin : al-Qadah al-Awfaya' wa A'zam al-Khulafa'".
Kairo:
Dar al-Salam,
2003.
Buku.