Gulo, J., and J. C. Sembiring. “The Influence of Gross Profit Margin, Net Profit Margin, Company Size, and Sales Growth on Profit Growth (in Manufacturing Companies Registered on Bei in 2019-2022)”. ProBisnis : Jurnal Manajemen, vol. 15, no. 1, Feb. 2024, pp. 77-86, doi:10.62398/probis.v15i1.421.