Toogood, Granville N.
Gramedia Pustaka Utama, 1997
Buku Teks
Donovan, Jeremey, author
McGraw-Hill, 2014
Buku Teks
Lewis, Lynn S., author
American Management Association, 2008
eBooks
Chan, Janis Fisher, author
[American Management Association;, ], 1999
eBooks
Atwood, Christee Gabour, author
American Society for Training & Development, 2007
eBooks