Krissada Worapin. (2020) Development of an Instructional Process Based on Authentic Learning to Enhance Mathematical Problem-solving Abilities of Elementary School Students in Phetchaburi. <i>Journal of Education Studies, Chulalongkorn University</i>, <i>48</i>(4), 1-19.Krissada Worapin. "Development of an Instructional Process Based on Authentic Learning to Enhance Mathematical Problem-solving Abilities of Elementary School Students in Phetchaburi". Journal of Education Studies, Chulalongkorn University 48 (2020):1-19.Krissada Worapin. Development of an Instructional Process Based on Authentic Learning to Enhance Mathematical Problem-solving Abilities of Elementary School Students in Phetchaburi. Centre for Education Innovation, Print and Online Media:ม.ป.ท. 2020.