ว่องไว ล., นันทะศรี ว., and เพ็งสวัสดิ์ ว. “The Development of Mathematics Learning Management Model for Sixth Grade Students in Schools under Sakon Nakhon Primary Educational Service Area Office 1”. Journal of Roi Et Rajabhat University, vol. 13, no. 3, Dec. 2019, pp. 29-36, https://so03.tci-thaijo.org/index.php/reru/article/view/180340.