Miftahul Walid et al. 2020. Analysis and Development of Seawater Density Measurement Algorithms Using Arduino Uno and YL-69 Sensor . Jurnal RESTI (Rekayasa Sistem dan Teknologi Informasi). 4, 5 (Oct. 2020), 951–956. DOI:https://doi.org/10.29207/resti.v4i5.2430.