“Effect of Operating Costs, Sales Volume, Working Capital and Assets Turnover on Net Profit: Pengaruh Biaya Operasional, Volume Penjualan, Modal Kerja dan Perputaran Aktiva Terhadap Laba Bersih” (2018) Indonesian Journal of Law and Economics Review, 1(3), p. 10.21070/ijler.v2i1.82. doi:10.21070/ijler.v2i1.82.