Ben Jackson, Robert Saunders, editors
Cambridge University Press, 2012
Buku Teks
edited by Maurice Mullard
Routledge, 1995
Buku Teks
Dorey, Peter, author
SAGE, 2014
Buku Teks
Lenin, Vladimir I., author
Foreign Languages Publishing House , [date of publication not identified]
Buku Teks
Keegan, William, author
Allen Lane, 1984
Buku Teks