โรจนธรรมกุล นิราศศิริ. “QUALITY OF LIFE DEVELOPMENT OF THE ELDERLY IN THE ASEAN COMMUNITY”. Academic Journal Phranakhon Rajabhat University 9, no. 1 (April 11, 2018): 225–237. Accessed May 28, 2024. https://so01.tci-thaijo.org/index.php/AJPU/article/view/115016.