Syaiful, S., H. Siregar, E. Rustiadi, and E. S. Hariyadi. “ANALYSIS OF MOTORCYCLE TRAFFIC SPEED WHICH CREATES NOISE IN FRONT OF WIYATA MANDALA JUNIOR HIGH SCHOOL DURING THE COVID-19 PANDEMIC”. ASTONJADRO, vol. 10, no. 2, Oct. 2021, pp. 225-36, doi:10.32832/astonjadro.v10i2.4772.