Byham, William C.
DDI Press, 2007
Buku Teks
Poza, Ernesto J.
South- Western Cengage Learning, 2014
Buku Teks
Carsrud, Alan L.
Springer, 2011
eBooks
Hastings, Sandra
American Society for Training and Development Press, 2005
eBooks
Christensen, C. Roland
Harvard University, 1953
Buku Teks