Hasibuan, E. “ANALYSIS OF RECEIVABLES MANAGEMENT EFFECTIVENESS AND THEIR EFFECT ON COMPANY LIQUIDITY AT PT JACO NUSANTARA MANDIRI MEDAN”. Jurnal Ekonomi, vol. 11, no. 01, June 2022, pp. 390-4, https://www.ejournal.seaninstitute.or.id/index.php/Ekonomi/article/view/263.