Não informado. (1920). British Yearbook of International Law. Royal Institute of International Affairs.
Chicago-referens (17:e uppl.)Não informado. British Yearbook of International Law. Oxford, Inglaterra: Royal Institute of International Affairs, 1920.
MLA-referens (8:e uppl.)Não informado. British Yearbook of International Law. Royal Institute of International Affairs, 1920.
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