APA
WHO, . (1985). The law and treatment of drug and alcohol dependent persons a comparative study of existing legislation. Geneva: WHO Regional Publications.
Chicago
WHO, . 1985. The law and treatment of drug and alcohol dependent persons a comparative study of existing legislation. Geneva: WHO Regional Publications.
Harvard
WHO, . (1985). The law and treatment of drug and alcohol dependent persons a comparative study of existing legislation. Geneva: WHO Regional Publications.
MLA
WHO, . The law and treatment of drug and alcohol dependent persons a comparative study of existing legislation. Geneva: WHO Regional Publications. 1985.