McKenzie, Jon, author
Routledge, 2001
Buku Teks
edited by George P. Stein, Agnes Stein
Prentice-Hall, 1973
Buku Teks
Flim, Else
Manteau, 1994
Buku Teks
Callahan, Madelyn, author
[American Society for Training and Development Press, American Society for Training and Development Press], 2006
eBooks
Kania Dea Paramita, author
Fakultas Psikologi Universitas Indonesia, 2013
UI - Skripsi (Membership)