Ben-Chai, David, author
Sense, 2012
eBooks
Copeland, Richard W., author
Macmillan, 1970
Buku Teks
Artikel Jurnal
Suci Sekar Dini, author
Fakultas Kesehatan Masyarakat Universitas Indonesia, 2011
UI - Skripsi (Open)
Japan : University of Library and Information Science
Majalah, Jurnal, Buletin