Hovenkamp, Herbert
West Publishing, 1993
Buku Teks
Levitt, Mortimer
AMACOM, 1979
Buku Teks SO
Jeston, John
Routledge, 2014
Buku Teks SO
Garrett, James J.
Practising Law Institute, 1978
Buku Teks SO
Hudson, William J.
John Wiley & Sons, 1993
Buku Teks SO