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APA Citation
Iemmi, V., Knapp, M., Reid, C., Sholl, C., Ferdinand, M., Buescher, A., & Trachtenberg, M. (n.d.). positive behavioural support for children and adolescents with learning disabilities and behaviour that challenges: an initial exploration of service use and costs. Tizard learning disability review, 21(4), 169–180. http://access.bl.uk/ark:/81055/vdc_100036833375.0x000024