Burks, Ardath W.
Boulder Westview Press 1991,
Buku Teks
Tsurumi, Kazuko
Princeton University Press , 1970
Buku Teks SO
Tokyo Bureau statistics office of the Prime Minister 1967
Buku Teks
Hasegawa, Nyozekan
Tokyo: Kodansha International, [c1965]
Buku Teks
Shillony, Ben-Ami
Clarendon Press, 1991
Buku Teks SO