edited by Robert Holman Coombs
Sage, 2001
Buku Referensi
Splinter, John P., author
Zondervan Publishing House, 1992
Buku Referensi
Rich, Phil, author
John Wiley & Sons, 2000
Buku Teks
edited by Matt Bonass, Michael Rudd
Globe Law and Business, 2010
Buku Teks
ed. by Michael J. Kennish
CRC Press, 1994
Buku Referensi