Eddy, T. . “Improvement Of Clean Field With The Implementation Of Medan City Regional Regulation No. 3 Of 2014 Regarding A No-Smoke Area In Medan City”. International Journal of Educational Research &Amp; Social Sciences, vol. 3, no. 1, Feb. 2022, pp. 211-6, doi:10.51601/ijersc.v3i1.282.