Artikel Jurnal
edited by Selma J. Mushkin, David W. Dunlop
Pergamon Press , 1980
Buku Teks
Kongstvendt, Peter R., author
Jones & Bartlet Learning, 2009
Buku Teks
Department of Child and Adolescent Health and Development WHO
World Health Organization, 2000
Buku Teks
Ade Erma Setyowati, author
Artikel Jurnal