Alahdal A, Hassan Al-Ahdal AAM. Effectiveness of Collaborative Learning as a Strategy in the Teaching of EFL. Opción [Internet]. 3 de agosto de 2019 [citado 6 de mayo de 2024];350:1026-43. Disponible en: https://www.produccioncientificaluz.org/index.php/opcion/article/view/24566