Edited by Kajima Institute of International Peace.
Japan Times, 1971
Buku Referensi
Kajima, Morinosuke, author
Charles E. Tuttle, 1969
Buku Teks
Chapman, J.W.M., author
Frances Printer, 1983
Buku Teks
edited by Herbert J. Ellison
Westview Press, 1987
Buku Teks
Kabushiki Kaisha Rokuichi Shobo, 2017
Buku Teks