S. Indratmoko, I. B. Al Hakim, and W. Satrio Guntoro, “Analysis of People Response on Twitter Towards Tidal Wave Disaster in the Southern Coast of Yogyakarta Special Province (Case Studies: Parangtritis Beach, Bantul Regency)”, KSS, vol. 3, no. 20, pp. 353–366, Aug. 2019.