Llerena, K., Park, S. G., McCarthy, J. M., Couture, S. M., Bennett, M. E., & Blanchard, J. J. (2013). The Motivation and Pleasure Scale – Self-Report (MAP-SR): Reliability and Validity of a Self-Report Measure of Negative Symptoms. Compr Psychiatry.

Llerena, Katiah, Stephanie G. Park, Julie M. McCarthy, Shannon M. Couture, Melanie E. Bennett, و Jack J. Blanchard. "The Motivation and Pleasure Scale – Self-Report (MAP-SR): Reliability and Validity of a Self-Report Measure of Negative Symptoms." Compr Psychiatry 2013.

Llerena, Katiah, et al. "The Motivation and Pleasure Scale – Self-Report (MAP-SR): Reliability and Validity of a Self-Report Measure of Negative Symptoms." Compr Psychiatry 2013.