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APA Citation
Jacoby, R. J., Abramowitz, J. S., Blakey, S. M., & Reuman, L. (2019). is the hierarchy necessary? Gradual versus variable exposure intensity in the treatment of unacceptable obsessional thoughts. Journal of behavior therapy and experimental psychiatry, 64, 54–63. http://access.bl.uk/ark:/81055/vdc_100082130283.0x000064