Fauzan, M. “Effect of Stress and Leadership on Nurse Performance in General Hospital Simalungun Regency North Sumatera Province”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 35, no. 3, Sept. 2017, pp. 393-04, https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/7949.