Black, C.E., author
Princeton University press, 1943
Buku Teks
Moser, Charles A., author
Caroline House, 1979
Buku Teks
Junji Banno, author
Routledge, 1995
Buku Teks
Pylee, M.V., author
Asia Publishing House, 1960
Buku Teks
Wilson, Woodrow
Columbia University, [date of publication not identified]
Buku Teks