Alamsyah Harahap, and Renny Maisyarah. “Strategy for Reducing Doubtful Receivables on Cash Performance of PT PLN (Persero) ULP Denai”. INFOKUM, Vol. 13, no. 03, Mar. 2025, pp. 652-6, https://seaninstitute.org/infor/index.php/infokum/article/view/2834.