Vecina Jiménez, María Luisa, and Fernando Chacón Fuertes. “Positive Emotions in Volunteerism”. The Spanish Journal of Psychology 8, no. 1 (April 21, 2005): 30–35. Accessed November 18, 2024. https://revistas.ucm.es/index.php/SJOP/article/view/SJOP0505120030A.