WHO Expert Committee on Drug Dependence. (1999). WHO Expert Committee on Drug Dependence: Twenty-first report. World Health Organization.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWHO Expert Committee on Drug Dependence. WHO Expert Committee on Drug Dependence: Twenty-first Report. Geneva: World Health Organization, 1999.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWHO Expert Committee on Drug Dependence. WHO Expert Committee on Drug Dependence: Twenty-first Report. World Health Organization, 1999.
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