EUROPEAN MONITORING CENTRE FOR DRUGS AND DRUG ADDICTION. (1997). ANNUAL REPORT ON THE STATE OF THE DRUGS PROBLEM IN THE EUROPEAN UNION. 1995. COMUNIDAD EUROPEA.
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Chicago Style (17th ed.) Zitazioa
EUROPEAN MONITORING CENTRE FOR DRUGS AND DRUG ADDICTION. ANNUAL REPORT ON THE STATE OF THE DRUGS PROBLEM IN THE EUROPEAN UNION. 1995. LISBOA: COMUNIDAD EUROPEA, 1997.
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MLA (9th ed.) Zitazioa
EUROPEAN MONITORING CENTRE FOR DRUGS AND DRUG ADDICTION. ANNUAL REPORT ON THE STATE OF THE DRUGS PROBLEM IN THE EUROPEAN UNION. 1995. COMUNIDAD EUROPEA, 1997.
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Kontuz: berrikusi erreferentzia hauek erabili aurretik.