Purnama, I., Diana, and F. Yani. “Business Income, Operational Costs, and Production Costs on Net Profit After Tax at PT Unilever Indonesia Tbk Period 2016 - 2021”. Luxury: Landscape of Business Administration, vol. 1, no. 1, Jan. 2023, pp. 23-32, https://firstcierapublisher.com/index.php/luxury/article/view/17.