Black, Uyless D.
Prentice-Hall, 1987
Buku Teks
Matthews, Jeanna
John Wiley & Sons, 2005
Buku Teks
Ilham Karunia
Fakultas Ilmu Komputer Universitas Indonesia, 2006
UI - Skripsi (Membership)
Brown, Jeri B.
Lippincott , 1999
Buku Teks
Lippincott , 2003
Buku Teks