ทัดมั่นส., and ปัญญาอ. “Behavioral Expression in Public Service of the Youth Center Officials in Bangkok”. Journal of Humanities and Social Sciences, Rajapruk University, Vol. 4, no. supplement, Dec. 2018, pp. 185-9, https://www.tci-thaijo.org/index.php/rpu/article/view/159635.