Hanan, Mack, author
Amacom, 2011
Buku Teks
Taylor, Jim, author
Amacom, 2011
Buku Teks
Goldner, Paul S., author
American Management Association;, 2006
eBooks
Lambert, Brian, author
American Society for Training & Development, 2010
eBooks
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 1994
UI - Skripsi (Membership)