Klinvex, Kevin C.
McGraw-Hill , 1999
Buku Teks
Cook, Mark, author
Wiley-Blackwell, 2009
Buku Teks
Saragih, Rosdiana Safyanti, author
Fakultas Psikologi Universitas Indonesia, 2006
UI - Tesis (Membership)
Taguchi, Sherrie Gong, author
[American Management Association, ], 2002
eBooks
Harvard Business School Press , 2004
Buku Teks