Sirisak Thipthaweecharn และ Aumporn Makanong;Wichai Sawekngam. (2022) Development of an Instructional Model based on the Theoretical Cognitive Process of Visualization for Enhancing Spatial Thinking Skills of Preservice Teachers. <i>Journal of Rangsit University: Teaching & Learning</i>, <i>16</i>(1), 169-183.Sirisak Thipthaweecharn และ Aumporn Makanong;Wichai Sawekngam. "Development of an Instructional Model based on the Theoretical Cognitive Process of Visualization for Enhancing Spatial Thinking Skills of Preservice Teachers". Journal of Rangsit University: Teaching & Learning 16 (2022):169-183.Sirisak Thipthaweecharn และ Aumporn Makanong;Wichai Sawekngam. Development of an Instructional Model based on the Theoretical Cognitive Process of Visualization for Enhancing Spatial Thinking Skills of Preservice Teachers. บริษัท เอเชีย ดิจิตอลการพิมพ์ จำกัด:ม.ป.ท. 2022.