Fisher, Howard D.
Cavendish Publishing Limited, 1999
Buku Teks
Wesley-Smith, Peter
Oxford University Press, 1987
Buku Teks
Wrightsman, Lawrence S.
Brooks/Cole , 1998
Buku Teks
sponsored by the American Association of Law Libraries ; edited by Richard A. Danner, Marie-Louise H. Bernal
Buku Teks
Foster, Nigel G.
Blakcstone Press, 1993
Buku Teks SO