Sanseido, [date of publication not identified]
Buku Referensi
Iwasaki, Tamihei, author
Kenkyusha, 1960
Buku Referensi
Takahashi, M., author
Taiseido Shobo, 1953
Buku Referensi
New York Regents 1979
Buku Teks
Heinrich, Amy Vladeck
Columbia University Press, 1983
Buku Teks