Ople, Blas F., author
The Institute for Public Policy, 2001
Buku Teks
Toynbee, Arnold J., author
Meridian Books, 1958
Buku Teks
Takeo, Kuwabara, author
University of Tokyo Press , 1984
Buku Teks
Reilly, Kevin, author
Harper and Row, c1980
Buku Teks
Major, J. Russel, author
J.B. Lippincott, 1966
Buku Teks