edited by Stanley Cohen
McGraw-Hill, 1982
Buku Referensi
Prigent, Jean-Luc, author
Chapman & Hall/CRC , 2007
Buku Teks
Franklin, Maren, author
American Society for Training & Development, 2006
eBooks
Sinaga, Jonathan Fernandus Parningotan, author
Fakultas Eknonomi dan Bisnis Universitas Indonesia, 2016
UI - Makalah dan Kertas Kerja
Wickham, Philip, author
Prentice-Hall, 2008
Buku Teks