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), pp. 946-952. doi: 10.35335/jurnalmantik.Vol5.2021.1424.pp946-952.