Jaffe, Louis L., author
Little, Brown, 1972
Buku Teks
Gray, Oscar S.
The Bureau of National Affairs, 1973
Buku Teks
Eisenberg, Melvin A., author
Foundation Press, 2005
Buku Teks
Hart, James, author
Appleton-Century-Crofts, 1950
Buku Teks
Mashaw, Jerry L, author
Thomson/West, 2009
Buku Teks