Beck, S., Wojdyla, D., Say, L., Pilar Bertran, A., Meraldi, M., Harris Requejo, J., . . . Van Look, P. (2010). The worldwide incidence of preterm birth: A systematic review of maternal mortality and morbidity. Bulletin of the World Health Organization, 88(1), 31-38. https://doi.org/10.2471/BLT.08.062554
Chicago-Zitierstil (17. Ausg.)Beck, Stacey, Daniel Wojdyla, Lale Say, Ana Pilar Bertran, Mario Meraldi, Jennifer Harris Requejo, Craig Rubens, Ramkumar Menon, und Paul Van Look. "The Worldwide Incidence of Preterm Birth: A Systematic Review of Maternal Mortality and Morbidity." Bulletin of the World Health Organization 88, no. 1 (2010): 31-38. https://doi.org/10.2471/BLT.08.062554.
MLA-Zitierstil (9. Ausg.)Beck, Stacey, et al. "The Worldwide Incidence of Preterm Birth: A Systematic Review of Maternal Mortality and Morbidity." Bulletin of the World Health Organization, vol. 88, no. 1, 2010, pp. 31-38, https://doi.org/10.2471/BLT.08.062554.