Waleed Abd, I. R., Huseen Faraj, A. and Khaleel Ibraheem, M. (2019) “Effectiveness of the ring house strategy in collecting and developing visual thinking”, Opción, 350, p. 28. Available at: https://produccioncientifica.luz.edu.ve/index.php/opcion/article/view/27383 (Accessed: 30October2025).