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Apitsara Noiburee อน, Jularat Wattana จว, ตัณฑวุฑโฒ ว. The Learning Activity Based - on Khit Pen Concept to Enhance Classroom Research Knowledge for Teachers of Bang Khen District Non-formal and Informal Education Center under Bangkok Office of the Non-formal and Informal Education. Dusit Thani College J [internet]. 2018 May 28 [cited 2026 Sep. 14];12(2):277-90. available from: https://so01.tci-thaijo.org/index.php/journaldtc/article/view/126007