Ponmark, J., Thisara, P., & Lamsri, S. (2026). Development of a Participatory Model for Promoting Early Childhood Development by Grandparent Caregivers: A Case Study of Huai Yang Kham Child Development Center, Chun District, Phayao Province. Journal of Nursing and Public Health Research, 6(2), e280175. retrieved from https://he02.tci-thaijo.org/index.php/jnphr/article/view/280175