Petchvichit, Phanthip. “Concepts to Study the Roman Empire History of Western Historians”. Humanities and Social Sciences Nakhonsawan Rajabhat University Academic Journal 7, no. 1 (October 9, 2020): 169–182. Accessed May 19, 2024. https://so05.tci-thaijo.org/index.php/hssnsru/article/view/243497.