Harvard Business School Publication, 2001
Buku Teks
Dyche`, Jill, author
Addison-Wesley, 2002
Buku Referensi
Ammar Nashir, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2019
UI - Tesis (Membership)
Kumar, V., author
[Springer, ], 2012
eBooks
Adrian Payne, author
Cambridge University Press, 2013
eBooks