Newell, Kenneth W.
World Health Organization, 1975
Buku Teks
Byrne, Monica
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
edited for the International Epidemiological Association and the World Health Organization by Basil S. Hetzel
Oxford University Press, 1978
Buku Teks