Beitz, Charles R
Princeton University Press, 1979
Buku Teks
Williams, Howard
St.Maitin's Press, 1996
Buku Teks
Schippers, Birgit, author
Routledge, 2014
Buku Teks
Buzan, Barry, author
Cambridge University Press , 2015
Buku Teks
Sheldon Anderson ... [and others]
Westview Press, 2015
Buku Teks