四巨頭 (第一次世界大戦)
2023年9月7日閲覧。
↑ Beck, Roger B.; Linda Black; Larry S. Krieger; Phylip C. Caylor; Dahia Ibo Shabaka (1999). World History: Patterns of Interaction. Evanston, Illinois: McDougal Littell. pp. 760. ISBN 0-395-87274-X. https://archive.org/details/mcdougallittellw00beck
↑ “Italian delegates return to Paris peace conference”. history.com. 2023年9月7日閲覧。
↑ “The Treaty of Versailles”. History Learning Site. 2023年9月7日閲覧。, See the part:The attitude towards Germany of the "Big Three":"The "Big Three" were David Lloyd George of Britain, Clemenceau of France and Woodrow Wilson of America."
↑ MacMillan, Margaret (2003). Paris 1919. United States of America: Random House Trade. pp. 36, 306, 431. ISBN 0-375-76052-0