Artikel Jurnal
Nini Jayanti, author
Universitas Ciputra. Fakultas Pariwisata, 2016
Artikel Jurnal
Maritain, Jacques, author
Pantheon Books , 1955
Buku Teks
Puji Wahono, author
2005
UI - Disertasi (Membership)
The Demographic Institute Faculty of Economics University of Indonesia, 1992
Buku Referensi