Oades, Lindsay G.
Sage, 2019
Buku Teks
Connor, Mary
McGraw-Hill Open university press, 2012
Buku Teks
Fakultas Psikologi Universitas Indonesia, 2004
UI - Tesis (Membership)
Stone, Florence M.
American Management Association, 2007
eBooks
Way, Cynthia
American Society for Training & Development, 2011
eBooks