Fischer, Frank
Oxford University Press, 2012
Buku Teks
Beyme, Klaus Von
Springer, 2014
Buku Teks
Tavistock; [distributed in the U.S.A. by Harper & Row Publishers, 1973
Buku Teks
Edited by John Hogan, Michael Howlett
Palgrave Macmillan, 2015
Buku Teks
Hill, Christopher
Palbrave Macmillan, 2003
Buku Teks