APA (7th ed.) Zitazioa
SHEWAN, D., & ET AL. PERCEIVED RISK AND RISK REDUCTION AMONG ECSTASY USERS: THE ROLE OF DRUG, SET AND SETTING.
Chicago Style (17th ed.) Zitazioa
SHEWAN, D., eta ET AL. PERCEIVED RISK AND RISK REDUCTION AMONG ECSTASY USERS: THE ROLE OF DRUG, SET AND SETTING.
MLA (9th ed.) Zitazioa
SHEWAN, D., eta ET AL. PERCEIVED RISK AND RISK REDUCTION AMONG ECSTASY USERS: THE ROLE OF DRUG, SET AND SETTING.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.