Centre for Strategic and International Studies, 1991
Buku Teks SO
Moore, John Norton
Oceana Publications , 1992
Buku Teks SO
edited by Hamid Maulana
Westview Press, 1992
Buku Teks SO
Jureidini, Paul A.
Syracuse University Press, 1981
Buku Teks SO
Deegan, Heather
Routledge, 1996
Buku Teks SO