Armstrong, Michael
[Publisher not identified], [Date of publication not identified]
Buku Teks
Beach, Dale S.
Macmillan, 1975
Buku Teks
editor, A. Dale Timpe; penerjemah, Sofyan Cikmat
Elex Media Komputindo, 1991
Buku Referensi
Adam, Bob
1997
Multimedia
Harvard Business School Press, 1999
Buku Teks