NGUYEN, Manh Tuan; NGUYEN, Thi Vui. 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, [S. l.], v. 14, n. 7, p. 20–31, 2025. DOI: 10.52714/dthu.14.7.2025.1558. Disponível em: https://dthujs.vn/index.php/sshen/article/view/2356. Acesso em: 11 nov. 2026.