Susanto, S.P. and Andronicus, M. 2021. The Influence of Service Quality, Product Quality, and Promotion on Purchase Decision at PT. Unikitz Bersatu Group Medan Branch. Jurnal Mantik. 5, 2 (Jul. 2021), 946-952. DOI:https://doi.org/10.35335/jurnalmantik.Vol5.2021.1424.pp946-952.