Earl, Michael J., author
Prentice-Hall, 1989
Buku Teks
Turban, Efraim, 1930-, author
John Wiley & Son, 2012
Buku Teks
Bawden, David, author
Butterworth, 1990
Buku Teks
Haag, Stephen, author
McGraw-Hill, 2000
Buku Teks
Haag, Stephen, author
McGraw-Hill, 2010
Buku Teks