(2002). Vacines and Biologicals Who vaccine preventable diasease monitoring system 2002 global summary.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रVacines and Biologicals Who Vaccine Preventable Diasease Monitoring System 2002 Global Summary. 2002.
एमएलए (9वां संस्करण) प्रशस्ति पत्रVacines and Biologicals Who Vaccine Preventable Diasease Monitoring System 2002 Global Summary. 2002.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.