SOMYANA, W. Evaluating the achievement for the efficiency production of Chiang Mai farmers. Phranakhon Rajabhat Research Journal : Humanities and Social Sciences, [S. l.], v. 15, n. 2, p. 33–42, 2020. Disponível em: https://so05.tci-thaijo.org/index.php/PNRU_JHSS/article/view/221980. Acesso em: 11 dec. 2025.