Nguyen, Manh Tuan, and Thi Vui Nguyen. “The Effectiveness of Using Visual Representations in Organizing Activities Teaching the Concept of Time to 5-6-Year-Old Preschoolers: A Quasi-Experimental Study”. Dong Thap University Journal of Science - Social Sciences and Humanities Issue 14, no. 7 (May 12, 2025): 20–31. Accessed November 10, 2026. https://dthujs.vn/index.php/sshen/article/view/2356.