Barr, H. (1966). Probation research: A survey of group work in the prbation service. H.M.S.O.
Chicago-viite (17. p.)Barr, Hugh. Probation Research: A Survey of Group Work in the Prbation Service. London: H.M.S.O, 1966.
MLA-viite (9. p.)Barr, Hugh. Probation Research: A Survey of Group Work in the Prbation Service. H.M.S.O, 1966.
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