(คำเพชรดี) พป, (Khampetdee) PP, 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 [Internet]. 2018 Sep. 26 [cited 2024 Apr. 25];5(1):135-46. Available from: https://so02.tci-thaijo.org/index.php/EDMCU/article/view/147720