Kurniawan, A. F., R. Lapisa, and I. Y. Basri. “ANALISIS PENGARUH PEMASANGAN GROUNDSTRAP TERHADAP KONSUMSI BAHAN BAKAR DAN EMISI GAS BUANG PADA SEPEDA MOTOR”. Ranah Research : Journal of Multidisciplinary Research and Development, Vol. 1, no. 3, May 2019, pp. 657 -62, https://jurnal.ranahresearch.com/index.php/R2J/article/view/107.