Artikel Jurnal
Gilley, Jerry W., author
American Society for Training & Development, 1992
eBooks
Gilley, Jerry W., author
[American Society for Training and Development Press, American Society for Training and Development Press], 1998
eBooks
Fogg, C. Davis
AMACOM, American Management Association, 1994
Buku Teks
Rasiel, Ethan M., author
McGraw-Hill, 2001
Buku Teks