Brown, Paul B., author
Newton Abbot : David & Charles, distributor, 2006
Buku Teks
Haneberg, Lisa, author
American Society for Training & Development, 2010
eBooks
Grant-Williams, Renee, author
[American Management Association, ], 2002
eBooks
Miller, Brian Cole, author
[American Management Association, ], 2012
eBooks
Chase, Stuart, author
Macmillan, 1927
Buku Teks