Kluwer Law International, 1995
Buku Teks
Fabbrini, Federico, author
Oxford University Press, 2014
Buku Teks
edited by Reinhard Bendix and Seymour Martin Lipset
Free Press, 1966
Buku Teks
edited by Leo Goedegebuure ... [and others]
Pergamon Press, 1994
Buku Teks
Orum, Anthony M., author
Blackwell, 2003
Buku Teks