Kasetiam, U. “DEVELOPMENT OF A DIGITAL MARKETING POSITION SELF-ASSESSMENT SYSTEM BASED ON THE ONTOLOGY APPROACH”. Phranakhon Rajabhat Research Journal : Humanities and Social Sciences, vol. 19, no. 2, Dec. 2024, pp. 243-59, https://so05.tci-thaijo.org/index.php/PNRU_JHSS/article/view/272701.