Butow, Eric
American Management Association, 2009
eBooks
Maslen, Andy
Marshall Cavendish, 2011
Buku Teks
Wong Siu-Lun University of Hongkong, 1992
Buku Teks
Eri Maksudi
2013
UI - Tesis Membership
Hartley, Darin
American Society for Training & Development, 2010
eBooks