Beitz, Charles R
Princeton University Press, 1979
Buku Teks SO
Gilpin, Robert
Princeton University Press, 1987
Buku Teks
Olson, William Clinton
Prentice Hall International, 1994
Buku Teks SO
Viotti, Paul R
Longman, 2012
Buku Teks
Frost, Mervyn
Cambridge University Press, 1996
Buku Teks SO