APA (7 वां संस्करण) प्रशस्ति पत्र
PARKER, H., & ET AL. (1997). DRUGS FUTURES CHANGING PATTERNS OF DRUG USE AMONGST ENGLISH YOUTH. INSTITUTE FOR THE STUDY OF DRUG DEPENDENCE.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
PARKER, H., और ET AL. DRUGS FUTURES CHANGING PATTERNS OF DRUG USE AMONGST ENGLISH YOUTH. Londres: INSTITUTE FOR THE STUDY OF DRUG DEPENDENCE, 1997.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
PARKER, H., और ET AL. DRUGS FUTURES CHANGING PATTERNS OF DRUG USE AMONGST ENGLISH YOUTH. INSTITUTE FOR THE STUDY OF DRUG DEPENDENCE, 1997.
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