Não informado. (1930). Journal of School Health. American School Health Association.
Chicago-referens (17:e uppl.)Não informado. Journal of School Health. Kent, Ohio: American School Health Association, 1930.
MLA-referens (8:e uppl.)Não informado. Journal of School Health. American School Health Association, 1930.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.