T. Thi Minh Thanh and C. Thi Phong, “DEVELOPING SOCIAL COMMUNICATION SKILLS IN CHILDREN WITH AUTISM SPECTRUM DISORDER AGED 3–4 YEARS THROUGH NON-DIRECTIVE PLAY THERAPY”, HNUE Journal of Science: Educational Science, vol. 71, no. 2, pp. 92–100, Mar. 2026, doi: 10.18173/2354-1075.2026-0028.