Bastounis, A., Callaghan, P., Banerjee, A., & Michail, M. (2016). The effectiveness of the Penn Resiliency Programme (PRP) and its adapted versions in reducing depression and anxiety and improving explanatory style: A systematic review and meta‐analysis. Journal of Adolescence, 52(1), 37-48. https://doi.org/10.1016/j.adolescence.2016.07.004