edited by Eivind Smith
Kluwer Law International, 1995
Buku Teks
Lewis Mayers
Prentice-Hall, 1963
Buku Teks
Witt, Elder
Congressional Quarterly, Inc., 1986
Buku Teks
Kelling, George L.
Department of justice, 1999
Buku Teks
Cooper, Phillip J.
Oxford University Press , 1988
Buku Teks