chumaidi, zulfi, et al. “Digital Stethoscope in Improving the Diagnostic Accuracy of Heart Auscultation: STETOSKOP DIGITAL DALAM MENINGKATKAN AKURASI DIAGNOSTIK AUSKULTASI JANTUNG”. Jurnal Qua Teknika, vol. 16, no. 02, Oct. 2026, pp. 43-53, https://doi.org/10.35457/quateknika.v16i02.5656.