Melani, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2008
UI - Tesis (Open)
Zaiss, Carl D., author
Gramedia Pustaka Utama, 1997
Buku Teks
Toporek, Adam, author
AMACOM American Management Association, 2015
Buku Teks
Eunson, Baden
John Wiley & Sons, 1995
Buku Teks
Bell, Chip R., author
[American Management Association, American Management Association], 2013
eBooks