พันธุ์เขียน ท, wongwatthanaphong kampanart, Bodeerat C. Guidelines for promoting happiness in living a valuable life for the elderly in Mae Poen Subdistrict Administrative Organization, Mae Pin District, Nakhon Sawan Province. JPR [internet]. 2025 Apr. 29 [cited 2026 Oct. 9];8(1):หน้า 232 - 244. available from: https://so03.tci-thaijo.org/index.php/JPR/article/view/286717