Risley, T. R. (1966). The establishment of verbal behavior in deviant children. s.n..
Chicago-viite (17. p.)Risley, Todd Robert. The Establishment of Verbal Behavior in Deviant Children. [s.l.]: s.n., 1966.
MLA-viite (8. p.)Risley, Todd Robert. The Establishment of Verbal Behavior in Deviant Children. s.n., 1966.
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