Harvard Business School Press, 2004
Buku Teks
Adams, Thomas J.
Canfield Press, 1976
Buku Teks
Ohmae, Kenichi, author
McGraw-Hill , 1982
Buku Teks
Eyring, Pamela, author
American Society for Training & Development, 2008
eBooks
Sinek, Simon, author
Portfolio/Penguin, 2009
Buku Teks