Chapparo, C., Ranka, J., & Nott, M. (2017). The perceive, recall, plan & perform (PRPP) system of task analysis and intervention. In M. Curtin, M. Egan, and J. Adams (Eds.). Occupational therapy for people experiences illness, injury or impairment (7th ed., Chpt 18). Oxon, UK: Elsevier

Chapparo, C., Ranka, J., & Nott, M. (2017).  The perceive, recall, plan & perform (PRPP) system of task analysis and intervention.  In M. Curtin, M. Egan, and J. Adams (Eds.).  Occupational therapy for people experiences illness, injury or impairment (7th ed., 243-257).  Edinburgh: Elsevier