อิงคามระธร ท. THE UPGRADING TO SMART FARMER BY LEARNING FROM MASTER SMART FARMER OF PINEAPPLE PLANTATION FARMER IN RATCHABURI PROVINCE. Phranakhon Rajabhat Research Journal : Humanities and Social Sciences, [S. l.], v. 14, n. 2, p. 121–134, 2018. Disponível em: https://so05.tci-thaijo.org/index.php/PNRU_JHSS/article/view/131834. Acesso em: 1 oct. 2026.