World Health Organization. (1999). Sexually transmitted infections prevalence study methodology. World Health Organization.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWorld Health Organization. Sexually Transmitted Infections Prevalence Study Methodology. Geneva,Switzerland: World Health Organization, 1999.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWorld Health Organization. Sexually Transmitted Infections Prevalence Study Methodology. World Health Organization, 1999.
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