Kongpanunpol, O., and Y. Saifah. “Results of Using an Inquiry Training Model to Enhance Delayed Gratification for First Graders During a Transitional Period”. An Online Journal of Education, vol. 18, no. 1, June 2023, p. OJED1801006 (12 pages), https://so01.tci-thaijo.org/index.php/OJED/article/view/265879.