Cuevas Torres M, Marrero Batista M, Moreno Cedeño I, Santini Green E, Valentin Santana J, Ocasio Pérez A. Motivation of a group of volunteers affiliated with two nonprofit organizations on the Southern area of Puerto Rico. Informes Psicol. [Internet]. 2015 Jun. 30 [cited 2026 Jun. 6];15(1):47-61. Available from: https://revistas.upb.edu.co/index.php/informespsicologicos/article/view/934