US Department of State, A Digest of International Law as Embodied in Diplomatic Discussions, Treaties, and Other International Agreements, vol. 5, John Bassett Moore, (lire en ligne), p. 759.
Mary Breu, Last Letters from Attu: The True Story of Etta Jones, Alaska Pioneer and Japanese POW, Portland, Graphic Arts Books, (ISBN978-0-88240-852-1, lire en ligne), p. 296.