Personal Computer Sofware, [Date of publication not identified]
Buku Teks
Open Software Foundation
Prentice-Hall, 1990
Buku Referensi
Katzan, Harry, Jr., author
Van Nostrand Reinhold , 1970
Buku Teks
Phoenix Tech., 1991
Buku Teks
Shelly, Gary B., author
Anaheim Publishing, 1974
Buku Teks