Ratbunthong, C. “A Study of Reasons with Participating in activities of Undergraduate Student’s at Rajamangala University of Technology Phra Nakhon”. RMUTP Research Journal Humanities and Social Sciences, vol. 8, no. 1, June 2023, pp. 43-56, https://so05.tci-thaijo.org/index.php/rmutphuso/article/view/262337.