Kularbkao, S. “THE DEVELOPING AND PROMOTING OF OTOP COTTON FABRIC PRODUCTS FROM NIKHOM NAM UN DISTRICT, SAKON NAKHON PROVINCE TO INTERNATIONAL ARENAS”. Journal of Graduate School Sakon Nakhon Rajabhat University, vol. 13, no. 61, June 2016, pp. 187-94, https://so02.tci-thaijo.org/index.php/SNGSJ/article/view/59260.