Kirchheimer, Otto

Princeton University press, 1961

 Buku Teks

Low, Nicholas

Routledge, 1998

 Buku Teks

Koopmans, Tim, author

Cambridge University Press, 2003

 Buku Teks

Sterba, James P., author

Thomson Wadsworth, 2003

 Buku Teks

edited by David Ingram

Blackwell , 2002

 Buku Teks