Lancaster, Geoffrey A.
Macmillan, 1985
Buku Teks
Hanke, John E., author
Pearson - Prentice Hall, 2009
Buku Teks
Venezia Ryanka Sutrisno, author
Fakultas Ilmu Komputer Universitas Indonesia, 2013
UI - Skripsi (Membership)
Armstrong, J. Scott, author
John Wiley & Sons, 1985
Buku Teks
Chambers, John C. (John Carlton), 1928-, author
John Wiley & Sons, 1974
Buku Teks