Murdoch, James
A history of Japan
Routledge and Kegan Paul, 1949
 Buku Teks SO
Kaplan, David E.
Yakuza Japan's criminal underworld
University of California Press , 2003
 Buku Teks
Sansom, George Bailey, Sir, 1883-1965
A history of Japan
Charles E. Tuttle, 1987
 Buku Teks SO
Sansom, George Bailey, Sir, 1883-1965
A history of Japan
Charles E. Tuttle, 1987
 Buku Teks SO
Reischauer, Edwin O.
Japan past and present
Alfred A. Knopf, 1964
 Buku Teks