Nelly, N., G. Tjipta, H. Hakimi, and B. Lubis. “Procalcitonin As a Diagnostic Tool for Bacterial Neonatal Sepsis”. Paediatrica Indonesiana, Vol. 55, no. 5, Oct. 2015, pp. 268-72, doi:10.14238/pi55.5.2015.268-72.