Earle, James H.
Addison-Wesley, 1994
Buku Teks SO
Suparno Sastra M.
Elex Media Komputindo, 2009
Buku Teks SO
Bethune, James D.
Pearson-Prentice Hall, 2006
Buku Teks SO
Autodesk Inc., 1986
Buku Referensi
Kyles, Shannon R.
Blackwell Publishing, 2008
Buku Teks