Ministry of Foreign Affairs, 1976
Buku Teks
edited by James William Morley
Columbia U.P. , 1974
Buku Teks
Edited by Kajima Institute of International Peace.
Japan Times, 1971
Buku Referensi
Kuno, Yoshi S., author
Kennikat Press, 1937
Buku Teks
Gaimusho, 2014-
Buku Teks