เสมอใจ ฉัตยาพร. “Marketing Management and Performance of SMEs in Nontaburi Province”. Journal of Humanities and Social Sciences, Rajapruk University 4, no. 2 (September 30, 2018): 77–92. Accessed April 24, 2024. https://so03.tci-thaijo.org/index.php/rpu/article/view/144188.