Data General Corporation, 1974
Buku Referensi
Compaq Computer Corporation
Compaq Computer Corporation, 1999
Buku Teks
Hutty, Roger, author
Erlangga, 1988
Buku Teks
McCracken, Daniel D., author
John Wiley & Sons, 1974
Buku Referensi
Nyoman Susila, author
Cipta Karsa, 1983
Buku Teks