Hariyanto, Hadi, dan Gilang Ramadhan. “Comparative Analysis of Salinity Readings for Water Quality Monitoring Between IoT-Based Sensor Systems and Refractometer ”. Jurnal Nasional Teknologi Dan Sistem Informasi, vol. 11, no. 3, Desember 2025, hlm. 273-81, doi:10.25077/TEKNOSI.v11i3.2025.273-281.