Rizki Fadila
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2016
UI - Skripsi Membership
Reinhard, Michael
American Management Association, 2010
eBooks
Macmillan, 1973
Buku Teks
The OPEC fund for International Development , 2002
Buku Teks
Goode, Roy
Penguin Books, 2004
Buku Teks