D’Anna, Cristiana, Laura Rio, and Filippo Gómez Paloma. “Competitive Sport and Self-Concept in Adolescent”. Journal of Human Sport and Exercise 10, no. 1proc (September 27, 2021): S425-S429. Accessed April 23, 2024. https://www.jhse.ua.es/article/view/2015-v10-n1-proc-competitive-sport-and-self-concept-in-adolescen.