Sinaga, Tona Bontor Melkisedek, Zulfendri Zulfendri, and Juanita Juanita. 2020. “Analysis of Patient Safety Management in the In-Patient Room at Deli Hospital, Medan, North Sumatera”. Journal of Health Policy and Management 5 (3):180-88. https://thejhpm.com/index.php/thejhpm/article/view/190.