World Health Organization. (1997). Strategies for the prevention of blindness in national programmes: A primary health care approach (Second edition.). World Health Organization.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWorld Health Organization. Strategies for the Prevention of Blindness in National Programmes: A Primary Health Care Approach. Second edition. Geneva: World Health Organization, 1997.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWorld Health Organization. Strategies for the Prevention of Blindness in National Programmes: A Primary Health Care Approach. Second edition. World Health Organization, 1997.
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