subur, istikama et al. 2026. The Relationship Between Sleep Quantity And Stress Levels In The Elderly In Rw 05, Jatimulyo Village, Malang City . PROFESSIONAL HEALTH JOURNAL. 8, 1 (Apr. 2026), 338–347. DOI:https://doi.org/10.54832/phj.v8i1.1410.