Chiwakumnuan, Phatcharee, and kajidphan Tongkam. 2022. “The Development of Early Childhood Care Advising Ability to Parents by the Fourth-Year Students in Early Childhood Education Program Using Problem-Based Learning (PBL) Activities”. Journal of Research and Development Buriram Rajabhat University 17 (1):111-18. https://so03.tci-thaijo.org/index.php/RDIBRU/article/view/258543.