ขาวหิต เ. and จันทร์แก้ว เ. (2016) “ PHETCHABURI PROVINCE”., Srinakharinwirot University Journal of Sciences and Technology, 8(15, January-June), pp. 78–87. available at: https://ph02.tci-thaijo.org/index.php/swujournal/article/view/56098 (accessed: 29 September 2026).