Não informado. (1911). American Journal of Public Health. American Public Health Association.
Chicago-referens (17:e uppl.)Não informado. American Journal of Public Health. New York: American Public Health Association, 1911.
MLA-referens (8:e uppl.)Não informado. American Journal of Public Health. American Public Health Association, 1911.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.