Maternal serum vitamin D levels at 11-13 weeks of gestation in preeclampsia.

MLA

Yu, C. K. H., et al. “Maternal Serum Vitamin D Levels at 11-13 Weeks of Gestation in Preeclampsia.” Journal of Human Hypertension, vol. 27, no. 2, Feb. 2013, pp. 115–18. EBSCOhost, https://doi.org/10.1038/jhh.2012.1.

APA

Yu, C. K. H., Ertl, R., Skyfta, E., Akolekar, R., & Nicolaides, K. H. (2013). Maternal serum vitamin D levels at 11-13 weeks of gestation in preeclampsia. Journal of Human Hypertension, 27(2), 115–118. https://doi.org/10.1038/jhh.2012.1

Chicago

Yu, C K H, R Ertl, E Skyfta, R Akolekar, and K H Nicolaides. 2013. “Maternal Serum Vitamin D Levels at 11-13 Weeks of Gestation in Preeclampsia.” Journal of Human Hypertension 27 (2): 115–18. doi:10.1038/jhh.2012.1.