John Wiley & Sons, 2000
eBooks
Schonberger, Richard John, author
Chicago Irwin 1997,
Buku Teks
Jane, author
HarperCollins, 2005
Buku Teks
Smith, R. C.
Wiley , 1968
Buku Teks
Amira Taliya, author
Fakultas Ilmu Komputer Universitas Indonesia, 2020
UI - Skripsi (Membership)