Não informado. (1920). British Yearbook of International Law. Royal Institute of International Affairs.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. British Yearbook of International Law. Oxford, Inglaterra: Royal Institute of International Affairs, 1920.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. British Yearbook of International Law. Royal Institute of International Affairs, 1920.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.