รู้สุข ก, วงศ์เหลา เ, ไชยณรงค์ ป. The Development of Mathematics Learning Packages through Inquiry Method on the Ratios of Trigonometry for Mathayom Suksa 4 students. ubonreseva [internet]. 2021 Aug. 27 [cited 2026 Oct. 3];4(1):79-87. available from: https://so06.tci-thaijo.org/index.php/ubonreseva/article/view/250969