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doi.org/10.1023/A:1018740725281, hdl.handle.net/1765/73949
Cognitive Therapy and Research
Department of Medical Psychology and Psychotherapy

Lange, A., Richard, R., Gest, A., Lodder, L., & de Vries, M. (1998). The effects of positive self-instruction: A controlled trial. Cognitive Therapy and Research, 22(3), 225–236. doi:10.1023/A:1018740725281