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MLA-Zitierstil (8. Ausg.)USA, Congress, House of Representatives, Select Committee on Narcotics Abuse and Control, und USA Congress House of Representatives Select Committee on Narcotics Abuse and Control. Drug Abuse in the Workplace: Hearing Before the Select Committee on Narcotics Abuse and Control, House of Representatives, Ninety-ninth Congress, Second Session, May 7, 1986. U.S. G.P.O, 1987.