Arias Holgado, Mª Francisca, Francisco Fernández Serra, and Santiago Benjumea Rodríguez. “The Law of Effect and the Origin of Behavior”. Apuntes de Psicología 16, no. 3 (November 27, 1998): 259–282. Accessed October 26, 2026. https://apuntesdepsicologia.es/index.php/revista/article/view/1255.