Tabak, Daniel, author
England Research Studies Press, 1990
Buku Teks
Kane, Gerry, author
Prentice-Hall, 1992
Buku Referensi
Philipson, Graeme, author
Computer Technology Research, 1992
Buku Referensi
Gray, Pamela, author
McGraw-Hill, 1993
Buku Teks
Choudhary, Alok N. (Alok Nidhi), 1961, author
Kluwer, 1990
Buku Teks