Artikel Jurnal
Cindy Meilinda Sari, author
2016
UI - Tesis (Membership)
Bruton, Leonard T.
Prentice-Hall, 1980.
Buku Teks
edited by Anthony J. Hickey
Marcel Dekker, 2004
Buku Teks
Sondang Widya E., author
Fakultas Kesehatan Masyarakat Universitas Indonesia, 2009
UI - Tesis (Open)