World Health Organization
World Health Organization, 1983
Buku Teks
edited by Richard A. Smith
University of Hawaii Press, 1978
Buku Teks
edited by Joseph M. Kasonde, John D. Martin
World Health Organization, 1994
Buku Teks
Hicks, Donald
Her Majesty's Stationary Office, 1976
Buku Teks
edited by Hoarst Noack
University Park Press , 1980
Buku Teks