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 . Research Community and Social Development Journal, Nakhon Ratchasima, Thailand, v. 14, n. 3, p. 58–71, 2020. DOI: 10.14456/nrru-rdi.2020.45. Disponível em: https://so04.tci-thaijo.org/index.php/NRRU/article/view/240661. Acesso em: 7 oct. 2026.