ARROHMAN, sigit; 						SABIQUL ULA, Dzikri.
 Analisa Air Umpan Boiler Dengan Parameter Potential Hydrogen (pH) Dan Kesadahan Studi Kasus di PT. XYZ.
<strong>Jurnal Simpul Inovasi</strong>, [S.l.], v. 2, n. 2, p. 68-74, dec. 2025.
ISSN 3109-189X.
Available at: &lt;<a href="https://jos.unsoed.ac.id/index.php/simpul/article/view/18110" target="_new">https://jos.unsoed.ac.id/index.php/simpul/article/view/18110</a>&gt;. Date accessed: 21 aug. 2026.
doi: <a href="https://doi.org/10.20884/1.jsi.2025.2.2.18110">https://doi.org/10.20884/1.jsi.2025.2.2.18110</a>.