Haas, Jeffrey J., author
West A Thomson Reuters Busines, 2011
Buku Teks
Sirower, Mark L., author
Gramedia Pustaka Utama, 1998
Buku Teks
editor, Barbara Darraugh
[American Society for Training and Development Press, American Society for Training and Development Press], 1990
eBooks
Meirita Widaningrum, author
2003
UI - Tesis (Membership)
Coll, Steve, 1958-, author
Penguin Books, 2012
Buku Teks