Munter, Mary
Prentice-Hall, 2002
Buku Teks
Estop, Tora
[American Society for Training and Development Press;, ], 2005
eBooks
Hon, David
John Wiley & Sons, 1980
Buku Teks SO
Fardis, Michael N., editor
Springer, 2012
eBooks
Seekings, David
Crest publishing, 1999
Buku Referensi