Não informado. (1976). Advance Data from Vital & Health Statistics. National Center for Health Statistics.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Advance Data from Vital & Health Statistics. Hyattsville, Md: National Center for Health Statistics, 1976.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Advance Data from Vital & Health Statistics. National Center for Health Statistics, 1976.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.