Cook, Mark
Wiley-Blackwell, 2009
Buku Teks
Saragih, Rosdiana Safyanti
Fakultas Psikologi Universitas Indonesia, 2006
UI - Tesis Membership
Taguchi, Sherrie Gong
[American Management Association, ], 2002
eBooks
Harvard Business School Press , 2004
Buku Teks
Hickman, E. Stewart
[American Society for Training & Development Press, American Society for Training & Development Press], 2000
eBooks