Cita APA

Zhang, Y., Liu, X., Gao, S., Wang, J., Gu, Y., Zhang, J., . . . Li, Q. (2012). Risk Factors for Preterm Birth in Five Maternal and Child Health Hospitals in Beijing. Public Library of Science.

Chicago Style Citation

Zhang, Yun-Ping, Xiao-Hong Liu, Su-Hong Gao, Jia-Mei Wang, Yue-Shan Gu, Jiu-Yue Zhang, Xia Zhou, i Qing-Xia Li. Risk Factors for Preterm Birth in Five Maternal and Child Health Hospitals in Beijing. Public Library of Science, 2012.

Cita MLA

Zhang, Yun-Ping, et al. Risk Factors for Preterm Birth in Five Maternal and Child Health Hospitals in Beijing. Public Library of Science, 2012.