Erich P. Prien, editor
Pfeiffer, 2009
Buku Teks
Grow, Thomas A.
Prentice-Hall, 1975
Buku Teks SO
Halliday, Sandy
[RIBA , ], 2007
eBooks
Franklin, Maren
American Society for Training and Development Press, 2005
eBooks
Thomson, George F.
Institute of Personeel Management, 1975
Buku Teks