Refaldi, A., and K. Kardinal. “The Effect of Net Profit Margin (NPM) and Debt to Equity Ratio (DER) on Dividend Policy Dividend Policy Listed on the IDX30 Index for the Period 2019-2023”. Jurnal Multidisiplin Sahombu, vol. 5, no. 03, Mar. 2025, pp. 312-8, https://ejournal.seaninstitute.or.id/index.php/JMS/article/view/6481.