Aprillia Cindy Artanti, Rusnoto, and Ahmad Farid. “ The Relationship Between Physical Environment, Air Quality and Noise to Patient Comfort Levels in the Standard Inpatient Class (KRIS) of RS X Kudus”. International Journal of Economics, Business and Innovation Research, Vol. 5, no. 03, May 2026, pp. 1303-21, doi:10.63922/ijebir.v5i03.3398.