เกษสังข์ ภ., คำยัง อ., พุทธเสน ก., and เกษสังข์ อ., “Competency and Need Assessment for Professional Development in 21st Century, Loei Province of Teachers in Social Studies, Religion and Culture Learning Substance”, RMUTSV Research Journal, vol. 11, no. 1, pp. 132–145, Jan. 2019.