World Health organization. (2012). International travel and health. World Health Organization.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWorld Health organization. International Travel and Health. Geneva, Switzerland: World Health Organization, 2012.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWorld Health organization. International Travel and Health. World Health Organization, 2012.
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