Tomain, Joseph P.
West Publishing Company, 1981
Buku Teks
Laitos, Jan G.
West Publishing Co., 1992
Buku Teks
Glicksman, Robert L., author
West Publishing Co., 1995
Buku Teks
Davies, Jack, author
West Publishing, 1975
Buku Teks
edited by Kim Talus
UK Edward Elgar, 2014
Buku Teks