Não informado. (1973). Population Reports. Geoge Washington University, Department of Medical and Public Affairs.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Population Reports. Washington: Geoge Washington University, Department of Medical and Public Affairs, 1973.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Population Reports. Geoge Washington University, Department of Medical and Public Affairs, 1973.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.