Beard, Mike, author
Kogan Page, 2001
Buku Teks
Bragg, Steven M., author
John Wiley & Sons, 2007
Buku Referensi
Jefkins, Frank William, author
Erlangga, 2004
Buku Teks
Jefkins, Frank William, author
Erlangga, 1996
Buku Teks
Jefkins, Frank William, author
Pitman , 1980
Buku Teks