Walker, Marianne McGettigan
American law Institute Publishers, 1995
Buku Teks
Hurst, James Willard
Little, Brown, 1950
Buku Teks
Gilmore, Grant
Yale University Press, 1977
Buku Teks
edited Harold J. Berman
A Vintage Book, 1961
Buku Teks
Gould, William B., IV
MIT Press, 1982
Buku Teks