Yudha Laga Hadi Kusuma et al. 2026. Efektivitas Penerapan Teknik Deep Breathing Exercise Terhadap Penurunan Kecemasan Pasien Preoperative. MEDICA MAJAPAHIT. 18, 2 (Sep. 2026), 91–101. DOI:https://doi.org/10.55316/mm.v18i2.1277.