Artikel Jurnal
Mennes, L.B.M., author
North-Holland Publishing, 1969
Buku Teks
Ministry of Foreign Affairs, Japan, 1974
Buku Teks
edited by Takekazu Ogura
Fuji Publishing, 1967
Buku Teks
edited by Robert E. Ward
Princeton University Press, 1968
Buku Teks