Wanda Firmansyah [and others]
USAID, 2001
Buku Teks
Jacqueline Elizabeth, author
2012
UI - Skripsi (Open)
Billy Sarwono, author
Faculty of Humanities University of Indonesia, 2012
Artikel Jurnal
edited, Sri Harijati Hatmadji, Iwu Dwisetyani Utomo
Demographic Institute, Faculty of Economics UI, 2004
Buku Teks
Wynia, Matthew K., author
American Management Association, 2007
eBooks