อังฉกรรจ์ ว, วงศ์เหลา เ, ศิริวงศ์ พ. A Development of the Mathematics Learning Package on Geometric Transformation Based on Inquiry Approach by Using GSP with Emphasis on Spatial Sense for Mattayom Suksa Two Students. ubonreseva [internet]. 2021 Aug. 27 [cited 2026 Oct. 4];3(2):111-9. available from: https://so06.tci-thaijo.org/index.php/ubonreseva/article/view/250955