Choper, Jesse H., author
Harcourt Brace Legal and Profesional Publications, 1989
Buku Teks
Cohen, Jerome B., author
Richard D. Irwin, 1973
Buku Teks
Friendly, Fred W.
Random House, 1984
Buku Teks
Graham, Benjamin, 1894-1976, author
McGraw-Hill, 1962
Buku Teks
Prime, John H., author
Prentice-Hall, 1958
Buku Teks