Northcraft, Gregory B.
The Dryden Press , 1990
Buku Teks
McCalman, James
Paul Chapman Production, 1992
Buku Teks
Dudi Agung RA
Universitas Indonesia, 2004
UI - Tesis (Membership)
Cowan, Stella Louise
[American Society for Training & Development Press, American Society for Training & Development Press], 2001
eBooks
Kuotsai Tom Liou
Marcel Dekker, 2001
Buku Teks