Japan Center for International Exchange, 1999
Buku Teks
Kuno, Yoshi S.
Kennikat Press, 1937
Buku Teks SO
Adams, T.F.M.
Kodansha International, 1972
Buku Teks
Sansom, George Bailey, Sir, 1883-1965
Stanford University Press, 1958
Buku Teks
Latourette, Kenneth Scott
Macmillan, 1951
Buku Teks