PUNNANAN, C. NINE KEYS PHILOSOPHY FOR HUMAN RESOURCE DEVELOPMENT BY PALANGJIT DHAMMA JAKRAWAN INSTITUTE. Journal of MCU Nakhondhat, Nakhon Si Thammarat, Thailand, v. 7, n. 5, p. 12–20, 2020. Disponível em: https://so03.tci-thaijo.org/index.php/JMND/article/view/243116. Acesso em: 6 may. 2024.