Contento Minga, Norma Elizabeth, and Floralba del Rocío Aguilar Gordón. 2025. “Metodology Strategy for the Development of Preoperational Thinking in the Teaching of Oral and Written Comprehension and Expression in Pre-School Children”. SAPERES UNIVERSITAS 8 (1): 27-58. https://publishing.fgu-edu.com/ojs/index.php/RSU/article/view/560.