Hayes, Philip
McGraw-Hill, 2011
Buku Teks
Pietrzak, Theodore
[American Society for Training and Development Press;;, ], 2005
eBooks
DuBrin, Andrew J.
Reston Publishing Company, 1983
Buku Teks
Pantry, Sheila
Facet Publishing, 2003
Buku Teks
Yerbury, Hilary
University of Technology, 1992
Buku Referensi