Rosyida, Novita, et al. “Development of Web-Based Geographic Information System for Water Quality Monitoring of Watershed in Malang”. INTENSIF: Jurnal Ilmiah Penelitian Dan Penerapan Teknologi Sistem Informasi, vol. 6, no. 2, Aug. 2022, pp. 184-97, https://doi.org/10.29407/intensif.v6i2.17514.