Harianto, H., Irawan, Y.H., Yawara, E. and Bakhtiar, H. 2019. Effect of Tapper Ratio on a Car Rear Spoiler Performance. Journal of Energy, Mechanical, Material, and Manufacturing Engineering. 4, 1 (May 2019), 1–14. DOI:https://doi.org/10.22219/jemmme.v4i1.7982.