สุชิน ก, จันท์พิพัฒน์พงศ์ ธ, เมืองใจ ท. A STUDY AND DEVELOPMENT OF ENHANCING A MODEL FOR HAPPINESS BY USING THE FACTORS AFFECTING THE HAPPINESS OF THE ELDERLY OF CHIANG KHONG DISTRICT, CHIANG RAI PROVINCE . Res Comm Soc Dev J [internet]. 2020 Jul. 1 [cited 2026 Oct. 7];14(3):58-71. available from: https://so04.tci-thaijo.org/index.php/NRRU/article/view/240661