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ศรีปากดี น, ศรีพุทธรินทร์ ส. Situations of Implementation in Non-Formal Education Based on Students’ Perceptions under Non-Formal Education and Informal Education Center in Chanpen Sub-District, Tao-ngoi District, Sakon Nakhon Province. RMUTT J Hum Soc Sci [Internet]. 2016 Jun. 30 [cited 2022 Aug. 16];3(1):104-13. Available from: https://so05.tci-thaijo.org/index.php/RMUTI_SS/article/view/193664