Metz, Clyde R.
McGraw-Hill, 1990
Buku Teks SO
Goldberg, David E.
Mc Graw-Hill , 2011
Buku Teks
Engel, Thomas
Pearson Prentice Hall, 2006
Buku Teks
Daniels, Farrington
John Wiley & Sons, 1966
Buku Teks
Castellan, Gilbert W.
Addison-Wesley, 1983
Buku Teks SO