Greco, L. A., Murrell, A. R., & Coyne, L. W. (2004). The Willingness and Action Measure for Children and Adolescents.
Lidia Cobos-Sánchez, Juan M. Flujas-Contreras, Inmaculada Gómez (2020) Willingness and Action Measure for Adolescents: Psychometric validation in Spanish adolescents. Journal of Contextual Behavioral Science, 15, 46-51. https://doi.org/10.1016/j.jcbs.2019.11.006 The Spanish Version of the WAM-C/A in adolescents is in Appendix A.