Positive behavior support for people with developmental disabilities : a research synthesis / by Edward G. Carr, Robert H. Horner, Ann P. Turnbull, Janet G. Marquis, Darlene Magito McLaughlin, Michelle L. McAtee, Christopher E. Smith, Kaarin Anderson Ryan, Michael B. Ruef, Ajit Doolabh ; David Braddock.    Washington, DC : AAMR, American Association on Mental Retardation, [1999]  ©1999 . xvi, 108 stran