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
edited by Reed L. Wadley
2002
Artikel Jurnal