Newell, Kenneth W., author
World Health Organization, 1975
Buku Teks
Candau, M.G., author
Departemen Kesehatan, 1973
Buku Teks SO
Byrne, Monica, author
Oxford University Press, 1973
Buku Teks
World Health Organization, 1986
Buku Teks
editor by David M. Dror, Alexander S. Preker
World Bank, 2002
Buku Teks