Cita APA

Qin, L., Lu, F., Yang, S., Xu, H., & Luo, B. (2016). Does Maternal Vitamin D Deficiency Increase the Risk of Preterm Birth: A Meta-Analysis of Observational Studies. Nutrients.

Chicago Style Citation

Qin, Lu-Lu, Fang-Guo Lu, Sheng-Hui Yang, Hui-Lan Xu, i Bang-An Luo. "Does Maternal Vitamin D Deficiency Increase the Risk of Preterm Birth: A Meta-Analysis of Observational Studies." Nutrients 2016.

Cita MLA

Qin, Lu-Lu, et al. "Does Maternal Vitamin D Deficiency Increase the Risk of Preterm Birth: A Meta-Analysis of Observational Studies." Nutrients 2016.