Eccles, Tony
London McGraw-Hill Book Company 1994,
Buku Teks
Russell, Doug, author
Amacom, 2011
Buku Teks
Feder, Harold A., author
CRC Press, Taylor & Francis Group, 2008
Buku Teks
Farrell, Thomas S. C., author
Corwin Press, 2006
Buku Teks
McGowan, Tony
Allen & Unwin, 1995
Buku Teks