John Wiley & Sons, 1983
Buku Teks
Howard, Keith
MCB University Press, 1990
Buku Referensi
Phillips, Patricia Pulliam
American Society for Training & Development Press, 2001
eBooks
Keen, Jeffrey S.
John Wiley & Sons, 1981
Buku Teks
editor S.R. Epton; R.L. Payne dan A.W. Pearson; Penyunting Lili Rasjidi
Remaja Rosdakarya, 1991
Buku Teks