Corbin, Arthur Linton, 1874-1967, author
West Publishing, 1952
Buku Teks
Eisenberg, Melvin A., author
Harcourt Brace, 1994
Buku Teks
Hunter, Howard O.
Gorham & Lamont, 1987
Buku Teks
Swan, John
Emond Montgomery Publications Limited, 1985
Buku Teks
Baggiano, Antonio
Graham & Trotman, 1991
Buku Teks