Lefcoe, George, author
LexisNexis, 1993
Buku Teks
Moynihan, Cornelius J., author
West Publishing, 1962
Buku Teks
Hames, Joanne Banker, author
Prentice-Hall, 1998
Buku Teks
Bernhardt, Roger, author
West Publishing, 1993
Buku Teks
Cunningham, Roger A., author
West Pub., 1993
Buku Teks