Basch, Paul F., author
Oxford University Press , 1999
Buku Teks
Birn, Anne-Emanuelle, author
Oxford University Press, 2017
eBooks
Sharma, Manoj, author
Jones and Bartlett Publishers, 2010
Buku Teks
Pan American Health Organization
PAHO, 1992
Buku Teks
World Health Organization, 1974
Buku Teks