Cervelló, Eduardo M., Amparo Escartí, and José F. Guzmán. “Youth Sport Dropout from the Achievement Goal Theory”. Psicothema 19, no. Número 1 (December 31, 2007): 65–71. Accessed September 18, 2026. http://156.35.33.188/index.php/PST/article/view/8598.