Syafrizaldi, Syafrizaldi, Syukur Kholil, Hasrat Efendi Samosir, and Ahmad Tamrin Sikumbang. 2022. “The Disaster Communication System in the City of Medan”. Jurnal Studi Komunikasi 6 (2), 655 -78. https://doi.org/10.25139/jsk.v6i2.4927.