Sinaga, A. et al. 2025. Pengaruh Kualitas Pelayanan dan Penangguhan Brand Image Terhadap Kepuasan Pelanggan Pada Cosmetic Underprice di Medan. Innovative: Journal Of Social Science Research. 5, 3 (May 2025), 1787–1799. DOI:https://doi.org/10.31004/innovative.v5i3.19094.