Khalifah (Vietnamese Wikipedia)

Analysis of information sources in references of the Wikipedia article "Khalifah" in Vietnamese language version.

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3books.google.com

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books.google.com

McNab, Chris (2017). Famous Battles of the Medieval Period (bằng tiếng Anh). New York: Cavendish Square Publishing, LLC. tr. 36. ISBN 9781502632470.
Rubin, Barry (ngày 17 tháng 3 năm 2015). The Middle East: A Guide to Politics, Economics, Society and Culture. Routledge. tr. 478. ISBN 978-1-317-45578-3.
Incorporated, Facts On File (2008). United Arab Emirates. Infobase Publishing. tr. 11. ISBN 978-1-4381-0584-0.

doi.org

Lecker, Michael (2008), “The 'Constitution of Medina': Muhammad's First Legal Document”, Journal of Islamic Studies, 19 (2): 251–253, doi:10.1093/jis/etn021. |ngày truy cập= cần |url= (trợ giúp)

nytimes.com

Moaveni, Azadeh (ngày 12 tháng 1 năm 2018). “The Lingering Dream of an Islamic State”. The New York Times.