Hibberd, James Shirley, author
Groombridge, 1953
Buku Teks
Harvey, Clare G., author
Thorsons, 1995
Buku Referensi
Adhiguna Mahendra, author
Fakultas Ilmu Komputer Universitas Indonesia, 2005
UI - Tesis (Membership)
Barnard, Julian, author
Ashgrove Press, 1988
Buku Referensi
R. Budi Haryanto, author
Fakultas Teknik Universitas Indonesia, 2009
UI - Tesis (Open)