Kissinger, Henry A., author
Doubleday, 1958
Buku Teks
Louka, Elli, author
Edward Elgar, 2011
Buku Teks
Westview Press, 1990
Buku Teks
edited by Gro Nystuen, Stuart Casey-Maslen, Annie Golden Bersagel
Cambridge University Press, 2015
Buku Teks
Griffiths, Peter, author
Edward Arnold, 1987
Buku Teks