Hertuida Clara, Hasan, H.C. and Nambiar, N. 2025. Design and Validation of Educational Material Aimed at Increasing Self-Efficacy of People With Diabetes Mellitus Type 2. Holistic Nursing Plus. 3, 2 (Sep. 2025), 209–225. DOI:https://doi.org/10.58439/hnp.v3i2.406.