Pérez Turpin, José Antonio, and Concepción Suárez Llorca. “A Study about the Drop Out in Organized Youth Sports Competition”. Journal of Human Sport and Exercise 2, no. 1 (December 3, 2008): 28–34. Accessed June 23, 2024. https://www.jhse.ua.es/article/view/2007-v2-n1-estudio-del-abandono-de-los-jovenes-en-la-competicion.