Ozturk, Umut, author
Mizan Learning Center, 2006
Buku Teks
Thomas Rofer, editor
[, Springer-Verlag], 2012
eBooks
Harahap, Ifrul Dwimachyar, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2010
UI - Tesis (Open)
The World Bank; Dono Sumardi, translator
Salemba Empat, 2006
Buku Teks
Rollin, Jack, author
Facts On File , 1990
Buku Referensi