Não informado. (1976). Advance Data from Vital & Health Statistics. National Center for Health Statistics.
Cita Chicago Style (17a ed.)Não informado. Advance Data from Vital & Health Statistics. Hyattsville, Md: National Center for Health Statistics, 1976.
Cita MLA (8a ed.)Não informado. Advance Data from Vital & Health Statistics. National Center for Health Statistics, 1976.
Precaución: Estas citas no son 100% exactas.