Routledge, 2009
eBooks
Aditya Ardhana, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2008
UI - Tesis (Open)
Yoder, Dale, author
Prentice-Hall, 1962
Buku Teks
Yoder, Dale, author
Prentice-Hall, 1984
Buku Teks
Yeni Indah Lestari, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2012
UI - Skripsi (Open)