Sakamoto, Taro
The International Society for Educational Information, 1984.
Buku Teks
Kawatake, Toshio, 1924-, author
Kokusai Bunka Shinkokai, 1971
Buku Teks
Inoura, Yoshinobu
Kokusai Bunka Shinkokai, 1971
Buku Teks
Jin`ichi Konishi, author
Princeton University Press, 1986
Buku Teks
Beasley, W.G
University of California Press , 1999
Buku Teks