Não informado. (2001). American Journal of Public Health: Supplement. American Public Health Association.
Chicago-referens (17:e uppl.)Não informado. American Journal of Public Health: Supplement. Washington: American Public Health Association, 2001.
MLA-referens (8:e uppl.)Não informado. American Journal of Public Health: Supplement. American Public Health Association, 2001.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.