Harahap, J., C. S. Putra, and R. Wiriadibrata. “The Analysis of Surgery Patients Anxiety Reviewed from Pre Operative Services at Dr. R. M Djoelham Binjai Public Hospital”. Journal La Medihealtico, Vol. 2, no. 2, Mar. 2021, pp. 99-111, doi:10.37899/journallamedihealtico.v2i2.331.