Mudloifah, Istatik, and Tarzan Purnomo. “Analysis of Water Quality in Asmoroqondi Beach, Palang District, Tuban Regency Using the Principal Component Analysis (PCA) Method”. LenteraBio : Berkala Ilmiah Biologi , vol. 12, no. 3, June 2023, pp. 273-80, doi:10.26740/lenterabio.v12n3.p273-280.