Herrera Sánchez, I. M., León Rubio, J. M. and Medina Anzano, S. (2005): “A Pragmatic Guideline for Evaluation of Social Intervention”, The Spanish Journal of Psychology, 8(1), pp. 21–29. Available at: https://revistas.ucm.es/index.php/SJOP/article/view/SJOP0505120021A (Accessed: 18 November 2024).