Sari Tarumasely, Susi Siswati. Analisis Rasio Profitabilitas Pada PDAM Tirta Merapi Kabupaten Klaten Berdasarkan Operating Profit Margin, Net Profit Margin, Return On Asset dan Return On Equity. EJBA [Internet]. 2021 Apr. 30 [cited 2026 Apr. 18];15(1). Available from: https://journal.ukrim.ac.id/index.php/jem/article/view/226