Thi Huong, Trinh, Lu Hung Minh, and Trinh Thi Lan. “DEVELOPING OBSERVATION SKILLS FOR CHILDREN 5-6 YEARS OLD THROUGH BIG-BOOK”. Journal of Science Educational Science 69, no. 4A (October 2, 2024): 187–197. Accessed January 15, 2025. https://hnuejs.edu.vn/es/article/view/535.