Steinberg, Charles Side, author
Hastings House, 1980
Buku Teks
Packer, Herbert L., author
McGraw-Hill, 1973
Buku Teks
edited by Charles J. White and Norman Gross
American Bar Association , 1985
Buku Teks
Jones, Harry W., author
The Foundation Press, 1980
Buku Teks
Brown, Esther Lucile, author
Russell Sage Foundation, 1948
Buku Teks