Phumwisai, Kittiyanee, and Maneeya Surat. “Development of Lifelong Learning Indicators of Teachers Under Nong Bua Lamphu Province: Development of Lifelong Learning Indicators of Teachers Under Nong Bua Lamphu Province”. RATANABUTH JOURNAL 5, no. 1 (April 30, 2023): 197–210. accessed September 4, 2026. https://so07.tci-thaijo.org/index.php/rtnb/article/view/2508.