Tarigan, P.K. et al. 2025. THE EFFECT OF SLEEP HYGIENE ON INSOMNIA IN DIABETES MELLITUS PATIENTS AT ROYAL PRIMA HOSPITAL MEDAN 2024. Nurse and Holistic Care. 5, 1 (Apr. 2025), 50–60. DOI:https://doi.org/10.33086/nhc.v5i1.7167.