Taylor, James, author
American Management Association, 2006
eBooks
Kirkpatrick, E.G., author
John Wiley & Sons, 1970
Buku Teks
edited by Tan Jing Jee & You Poh Seng with Emily Ding
Addison-Wesley Publishing, 1987
Buku Referensi
Giesecke, Joan, author
[American Library association, American Library association], 2001
eBooks
Ellis, Carol W., author
[American Management Association, ], 2005
eBooks