Cahyandaru, Zella, Didik Tamtomo, and RB Soemanto. 2019. “Linear Regression Analysis on Factors Affecting Health Surveillance Personnel Performance in Early Detection of Preeclampsia in Semarang, Central Java”. Journal of Health Policy and Management 4 (1):13-22. https://thejhpm.com/index.php/thejhpm/article/view/78.