แม้นศรี ฉรัญญา. “Efficiency of Services Provided for the Social Security of the Elderly of Lad Sawai Municipality, Lam Look Kha District, Pathum Thani Province”. Pathumthani University Academic Journal 11, no. 2 (December 30, 2019): 153–163. Accessed April 29, 2024. https://so05.tci-thaijo.org/index.php/ptujournal/article/view/217225.