Raieli, Roberto
Chandos, 2013
eBooks
Gema Parasti Mindara
Fakultas Ilmu Komputer Universitas Indonesia, 2013
UI - Tesis Membership
Dowling, Jennifer Coleman
McGraw-Hill, 2012
Buku Teks
Cawkell, Tony
Routledge, 1996
Buku Referensi
Jeffcoate, Judith
Prentice Hall, 1995, 1995
Buku Teks