Pasalung, P., and P. Kerdpratum. “Developing Strategic Models to Strengthen Multi-Level Marketing Businesses in the Dietary Supplement Sector in Thailand”. Journal of Multidisciplinary in Humanities and Social Sciences, vol. 8, no. 4, Aug. 2025, pp. 1461-80, https://so04.tci-thaijo.org/index.php/jmhs1_s/article/view/271251.