Tharpe, Nell L., author
Jones and Bartlett, 2009
Buku Teks
Tharpe, Nell L., author
Jones and Bartlett Publishers, 2006
Buku Teks
Uphold, Constance R., author
Barmarrae Books, 1999
Buku Referensi
Regional Office for South-East Asia, World Health Organization, United Nations
WHO , 1999
Buku Teks
Bryar, Rosamund M., author
Palgrave, 1995
Buku Teks