Davis, Kenneth Culp
University of Illinois Press, 1973
Buku Teks
edited by Eivind Smith
Kluwer Law International, 1995
Buku Teks
Lewis Mayers, author
Prentice-Hall, 1963
Buku Teks
Witt, Elder
Congressional Quarterly, Inc., 1986
Buku Teks
Kelling, George L., author
Department of justice, 1999
Buku Teks