Lindstrom, Robert L.
McGraw-Hill, 1994
Buku Teks SO
Morrisey, George L.
Addison-Wesley, 1987
Buku Teks SO
Leech, Thomas
[American Management Association, ], 2004
eBooks
Brusino, Justin
American Society for Training & Development, 2008
eBooks
Turmel, Wayne
American Society for Training & Development, 2011
eBooks