Cabrera-Darias, Marcial, and Rosario J. Marrero-Quevedo. “Motives, Personality and Subjective Well-Being in Volunteering”. Anales De Psicología Annals of Psychology, vol. 31, no. 3, Sept. 2015, pp. 791-0, doi:10.6018/analesps.31.3.180921.