FLORA OKTAYOVIE NUZULUL RAMADHINA. The Effect of Promotion Costs and Production Costs on Net Sales (Case Study at PT. Unilever Indonesia, Tbk. Period 2016-2023). International Journal of Economics and Management Research, [S. l.], v. 5, n. 2, p. 636–643, 2026. DOI: 10.55606/ijemr.v5i2.838. Disponível em: https://ijemr.asia/index.php/ijemr/article/view/838. Acesso em: 2 may. 2026.