Nia Rishandayani
Fakultas Kesehatan Masyarakat Universitas Indonesia, 2016
UI - Skripsi Membership
Gropper, Sareen S.
Cengage Learning, 2018
Buku Teks SO
Dessy Septianingsih
Fakultas Kedokteran Universitas Indonesia, 2009
UI - Skripsi Open
Fatmah
Center for Family Welfare University of Indonesia, 2005
Artikel Jurnal
World Health Organization
World Health Organization, 2002
Buku Teks SO