บัวสุวรรณ . ก. . ., and โลจนสิริศิลป . เ. . “Analysis of Contribution Margin to Support Business Decision Making: A Case Study of A Hotel in Muang District, Surat Thani Province”. STOU Academic Journal of Research and Innovation (Humanities and Social Science), vol. 2, no. 2, Oct. 2022, pp. 63-75, https://so04.tci-thaijo.org/index.php/InnovationStou/article/view/256905.