PradanaC., BaktionoA. and SaputriR. (2022) “Effect of Relationship Marketing Towards Customer Loyalty in the Lubricant Industry”, IJIEEB International Journal of Integrated Education, Engineering and Business eISSN 2615-1596 pISSN 2615-2312, 5(02), pp. 77-87. doi: 10.29138/ijieeb.v5i02.2117.