Artikel Jurnal
Statt, David A., author
Routledge, 2000
Buku Teks
Yulita Patricia Semet, author
Fakultas Psikologi Universitas Indonesia, 2014
UI - Tesis (Membership)
edited by María Bustelo, Lucy Ferguson, Maxime Forest.
Palgrave Macmillan, 2016
Buku Teks
Carnes, Barbara, author
American Society for Training & Development, 2010
eBooks