Alvin Arvela, et al. “ THE EFFECT OF PROGRESSIVE MUSCLE RELAXATION TECHNIQUES ON ANXIETY LEVELS IN PREOPERATIVE PATIENS WITH GENERAL ANESTHESIA TECHNIQUES AT AMANDA CIKARANG SOUTH HOSPITAL”. Journal of Indonesian Anesthesiology Nursing, vol. 1, no. 2, June 2025, doi:10.31101/jian.v1i2.4042.