Syandra Sari
Fakultas Ilmu Komputer Universitas Indonesia, 1995
UI - Skripsi Membership
Valley, John J.
Sams, 1992
Buku Referensi
Feuer, Alan R.
Prentice-Hall, 1982
Buku Teks SO
Daugherty, Dale
O'Reilly and Associates , 1991
Buku Teks SO
Dougherty, Dale
O"Reilly & Associates, Inc., 1992
Buku Teks SO