David Held, Anthony McGrew, editor
Polity Press, 2000
Buku Teks
Friedmann, Wolfgang, 1907-1972, author
Macmillan, 1951
Buku Teks
Caves, Richard E., author
Harper Collins College Publishers, 1996
Buku Teks
Barnes, James F., author
St. Martin`s Press, 1980
Buku Teks
Pereltsvaig, Asya, 1972-, author
Cambridge University Press, 2012
Buku Teks