Mcevoy, Sean
Routledge, 2006
Buku Teks
Russell, Jeffrey
American Society for Training & Development, 2006
eBooks
Haneberg, Lisa
American Society for Training & Development, 2006
eBooks
Beenham, Rosemary
Clive Bingley, 1990
Buku Teks
Chandler, Daniel
Routledge , 2007
Buku Teks