Phakamach, Phongsak. “A Study of Needs and Guidelines for the Development of School Botanical Gardens in Prachuapkhirikhan Province”. FOYER: The Journal of Humanities, Social Sciences, and Education 4, no. 1 (June 15, 2021): 87–117. Accessed April 26, 2024. https://so02.tci-thaijo.org/index.php/lajournal/article/view/242776.