Earl, Michael J.
Prentice-Hall, 1989
Buku Teks
Paul J.J. Welfens, editor
[Springer, ], 2012
eBooks
Harries, Steve
Library Assocantion Publishing, 1993
Buku Teks
Idea Group Publishing, 2004
Buku Teks
Turban, Efraim, 1930-
John Wiley & Sons, 2015
Buku Teks