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(คำเพชรดี) พ. ป.; (Khampetdee), P. P.; จีรภัทร์ บ.; ศรีนอก ส. Learning Management for Volunteer Spirit in the Core Subject of Social Studies, Religion and Culture in the High School, Phonphisai District, Nongkhai Province. Education MCU 2018, 5, 135-146.