Tharpe, Nell L.
Jones and Bartlett Publishers, 2006
Buku Teks SO
Uphold, Constance R.
Barmarrae Books, 1999
Buku Referensi
Regional Office for South-East Asia, World Health Organization, United Nations
WHO , 1999
Buku Teks SO
Swage, Thoreya
Butterworth-Heinemann , 2004
Buku Teks
Foster, Illysa R.
Jones & Bartlett Learning, 2011
Buku Teks