New York : Macmillan, 1993,
Buku Referensi
Deasti Nurmaguphita, author
Fakultas Ilmu Keperawatan Universitas Indonesia, 2015
UI - Tugas Akhir
Oakley, Peter
World Health Organization, 1989
Buku Teks
Morris, Schaefer
World Health Organization, 1999
Buku Teks
Smit, Trevor
Worthing, Sussex, 1993
Buku Teks