Thipsungwan, K., Sribenchamas, N., & Lamluk, P. (2017). Effects of the Development Competency Program of Volunteer for Taking Care of the Elderly in Community. Humanities and Social Sciences Journal of Pibulsongkram Rajabhat University, 12(1), 275–291. Retrieved from https://so01.tci-thaijo.org/index.php/GraduatePSRU/article/view/88169