• Buku Bos Revisi 2017

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• http://sejarahnusa.blogspot.co.id/2017/03/5-perjanjian-mengakhiri-perang-dunia-i.html

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• http://alyatitania.blogspot.co.id/2014/03/pengaruh-perang-dunia-1-dalam-bidang.html?m=1

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• http://dinda-sofia.blogspot.co.id/2015/05/sejarah-perang-dunia-1-lengkap-sebab.html?m=1

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• http://khabuka.blogspot.co.id/2012/04/10-penyebab-perang-dunia-1_12.html

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• https://id.m.wikipedia.org/wiki/Wilhelm_II_dari_Jerman

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• https://id.m.wikipedia.org/wiki/Franz_Joseph_I_dari_Austria

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• https://id.m.wikipedia.org/wiki/Mehmed_V

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• https://translate.googleusercontent.com/translate_c?depth=1&hl=id&nv=1&prev=search&rurl=translate.google.co.id&sl=sv&sp=nmt4&u=https://sv.m.wikipedia.org/wiki/Ferdinand_av_BulghhL6S3ftepYMaQJTFJZej008KcziQarien&usg=ALkJr

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• https://id.wikipedia.org/wiki/Raymond_Nicholas_Landry_Poincare

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• https://id.wikipedia.org/wiki/Perang_Dunia_I

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• https://id.wikipedia.org/wiki/Nikolai_II,_Kaisar_Rusia

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• https://id.wikipedia.org/wiki/Vittorio_Emanuele_II_dari_Italia

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• https://id.wikipedia.org/wiki/Woodrow_Wilson

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• https://id.wikipedia.org/wiki/Petar_I_dari_Serbia

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