Artikel Jurnal
Krishasto, author
Fakultas Teknik Universitas Indonesia, 2004
UI - Skripsi (Membership)
Martin, Teresa A.
John Wiley & Sons, 1999
Buku Referensi
Veer, Emily Vander, author
IDG Books Worldwide, Inc., 2001
Buku Teks
Universitas Indonesia, 2008
UI - Skripsi (Membership)