Carreres-Ponsoda, F., Escartí, A., Cortell-Tormo, J. M., Fuster-Lloret, V., & Andreu-Cabrera, E. (2012). The relationship between out-of-school sport participation and positive youth development. Journal of Human Sport and Exercise, 7(3), 671–683. https://doi.org/10.4100/jhse.2012.73.07