Sanseido, [date of publication not identified]
Buku Referensi
Iwasaki, Tamihei, author
Kenkyusha, 1960
Buku Referensi
Takahashi, M., author
Taiseido Shobo, 1953
Buku Referensi
Robert, Collins, author
Harper Collins, 1995
Buku Referensi
Stevens, Alan M., author
Ohio University Press, 2004
Buku Referensi