Akbar, Rafli Maulana, et al. “Pengaruh Biaya Promosi Dan Penjualan Terhadap Laba Perusahaan Pada PT Ultrajaya Milk Industry Tbk Periode 2021-2025”. ANTHOR: Education and Learning Journal, vol. 5, no. 5, Oct. 2026, pp. 1941-50, doi:10.31004/anthor.v5i5.1505.