Kent, George
Macmillan, 1995
Buku Teks SO
Bhagwati, Jagdish
MIT Press, c1991
Buku Teks
Gilpin, Robert
Princeton University Press, 1987
Buku Teks
Balaam, David N., 1950-
Pearson/Prentice Hall, 2005
Buku Teks SO
Balaam, David N., 1950-
Prentice-Hall, 1996
Buku Teks SO