Não informado. (1971). Health Devices. Emergency Care Research Institute.
Chicago-referens (17:e uppl.)Não informado. Health Devices. Philadelphia, Pa: Emergency Care Research Institute, 1971.
MLA-referens (8:e uppl.)Não informado. Health Devices. Emergency Care Research Institute, 1971.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.