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APA Citation
Frewing, T. M., Rapp, J. T., & Pastrana, S. J. (n.d.). using Conditional Percentages During Free-Operant Stimulus Preference Assessments to Predict the Effects of Preferred Items on Stereotypy. Behavior modification, 39, 740–765. http://access.bl.uk/ark:/81055/vdc_100060732893.0x00000f