Buku Teks
Robbins, Edward, 1944-, author
MIT Press, 1997
Buku Teks
Ian Chandra K., author
Elex Media Komputindo, [Date of publication not identified]
Buku Teks
Silver, Rawley, author
New York, 2002
Buku Teks
Universitas Indonesia, 1992
UI - Skripsi (Membership)