Kelby, Scott, author
Elex Media Komputindo, 2013
Buku Referensi
Sukor Rahim, author
Berita Publishing Sdn Bhd, 2010
Buku Referensi
Jenner, Bruce, author
Gramedia, 2005
Buku Teks
Queen, Douglas J., author
Alex Media Komputindo, 1993
Buku Teks
Altier, William J., author
Murai Kencana, 2004
Buku Teks