Axelrod, Rise B., author
St. Martin's Press, 1997
Buku Referensi
Axelrod, Rise B., author
St. Martin Press, 1997
Buku Referensi
Netzley, Michael, author
Prentice-Hall, 2001
Buku Teks
Beer, David, author
John Wiley & Sons, 2005
Buku Teks
Treamblay, Jean-Paul, author
McGraw-Hill, 1982
Buku Teks