Fajriah, Nurul, Tuti Alawiyah, and Ikna Urwatul Wusko. 2020. “A Analysis of Anionic Surfactant Levels in Barito River Water Using Visible Spectrophotometry Method”. Journal Pharmaceutical Care and Sciences 1 (1):55-61. https://ejurnal.unism.ac.id/index.php/jpcs/article/view/22.