Manja, Erni, and Henky Japina. 2026. “Pengaruh Kualitas Pelayanan Dan Keragaman Produk Terhadap Keputusan Pembelian Konsumen Alfamidi Sirandorung Rantauprapat”. Journal of Innovative and Creativity (Joecy) 5 (1):26578-88. https://doi.org/10.31004/joecy.v5i1.13545.