The World Bank
The Work Bank, 2007
Buku Teks
Booth, Lawrence D., author
John Wiley & Sons, 2013
Buku Teks
Yanur Akhmadi, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2020
UI - Tesis Membership
Artikel Jurnal
Kim, Suk H, author
Blackwell Publishing, 2006
Buku Teks