Conlan, Jim
John Wiley & Sons, 1984
Buku Teks
Durr, Michael, author
Erlangga, 1991
Buku Teks
Moche, Dinah L., author
John Wiley & Sons, 1981
Buku Teks
Jamsa, Kris, author
Osborne McGraw-Hill , 1992
Buku Teks
Norton, Peter, author
Microsoft Corp., 1985
Buku Teks