World Health Organization, 1983
Buku Teks
United Nations , 1990
Buku Teks
United Nations. Department of Public Information
United Nations. Department of Public Information, 1994
Buku Referensi
edited by Patrick Giddy
The Council For Research In Values And Philosophy, 2001
Buku Teks
Miller, Jamie, author
Oxford University Press, 2016
eBooks