Tonghan, Pattanapong. “THE SPATIAL POTENTIAL ASSESSMENT FOR THE DEVELOPING SOURCES FOR LOCAL PRODUCT SELLING PLACES CASE STUDY : YAN YAO SUB-DISTRICT, SAM CHUK DISTRICT, SUPHAN BURI PROVINCE”. Journal of Liberal Art of Rajamangala University of Technology Suvarnabhumi 4, no. 2 (August 28, 2022): 334–346. Accessed May 5, 2024. https://so03.tci-thaijo.org/index.php/art/article/view/260897.