Witriyani 2025. Effectiveness of Progressive Muscle Relaxation in Reducing Insomnia Severity Among Older Adults: Implementasi Relaksasi Otot Progresif Terhadap Penurunan Skala Insomnia Pada Lansia. Informasi dan Promosi Kesehatan . 4, 1 (Jun. 2025), 35–46. DOI:https://doi.org/10.58439/ipk.v4i1.368.