Espada, José P., María T. Gonzálvez, Mireia Orgilés, Daniel Lloret, y Alejandro Guillén-Riquelme. 2015. «Meta-Analysis of the Effectiveness of School Substance Abuse Prevention Programs in Spain». Psicothema 27 (Número 1):5-12. https://reunido.uniovi.es/index.php/PST/article/view/10621.