Gray, Clifford F.
Irwin-McGraw-Hill, 2000
Buku Teks
Anderson, Dennis
Global Environment Facility , 1993
Buku Teks
Barkley, Bruce T., author
McGraw-Hill, 2004
Buku Teks
Wulan Maulidiah, author
Fakultas Teknik Universitas Indonesia, 2014
UI - Skripsi (Membership)
Lis Iswari, author
Fakultas Ilmu Komputer Universitas Indonesia, 2004
UI - Skripsi (Membership)