บุญเจียม ส. ., ทองไทย ธ. . and ศรีมานนท์ น. . (2023) “The Effectiveness of Surveillance and Promotion for Early Childhood Development Manual of Grandparents”, Thailand Journal of Health Promotion and Environmental Health, 45(4), pp. 63–80. Available at: https://thaidj.org/index.php/for4d/article/view/13257 (Accessed: 7October2026).