Megasari, M. 2013. Factors Associated with the Incidence of Postpartum Hemorrhage in Arifin Achmad Riau Province Year 2009-2010. Jurnal kesehatan komunitas (Journal of community health). 2, 2 (May 2013), 72–77. DOI:https://doi.org/10.25311/keskom.Vol2.Iss2.48.