Erich P. Prien, editor
Pfeiffer, 2009
Buku Teks
Franklin, Maren, author
American Society for Training and Development Press, 2005
eBooks
Moekijat, author
Alumni, 1987
Buku Teks
Moekijat, author
Alumni, 1974
Buku Teks
Thomson, George F., author
Institute of Personeel Management, 1975
Buku Teks