พันธุ์เขียน ท., kampanart wongwatthanaphong, and C. Bodeerat. “Guidelines for promoting happiness in living a valuable life for the elderly in Mae Poen Subdistrict Administrative Organization, Mae Pin District, Nakhon Sawan Province”. Journal of MCU Phetchaburi Review, vol. 8, no. 1, Apr. 2025, pp. หน้า 232 - 244, https://so03.tci-thaijo.org/index.php/JPR/article/view/286717.