van Dierendonck, D., Díaz, D., Rodríguez-Carvajal, R., Blanco, A., & Moreno-Jiménez, B. (2008). Ryff’s six-factor model of psychological well-being, a Spanish exploration. Social Indicators Research, 87(3), 473–479. https://doi.org/10.1007/s11205-007-9174-7