Situmeang, R. R., Halim, E. and Stefanny, S. (2020) “Influence on Prices, Quality of Service and Distribution on Palm Oil Crude Purchase Decisions at PT Bangun Sempurna Lestari Medan”, Jurnal Mantik, 4(2), pp. 1446-1451. doi: 10.35335/mantik.Vol4.2020.1012.pp1446-1451.