Galton, Jeremy
Page One Publishing, 2003
Buku Referensi
Slade, Catharine
Pageone, 2002
Buku Referensi
Soan, Hazel
Page One Publishing, 2003
Buku Referensi
Sharp, John
Microsoft Press, 2008
Buku Teks SO
Halvorson, Michael
Elex Media Komputindo, 2000
Buku Referensi