Harefa, S., Waruwu, D., Simanullang, A., & Pane, P. Y. (2026). Work stress & sleep quality as factors of hypertension in Labuhan Deli. Buletin Kedokteran & Kesehatan Prima, 5(2), 225–230. https://doi.org/10.34012/bkkp.v5i2.8634