एपीए उद्धरण

Liu, B., Xu, G., Sun, Y., Qiu, X., Ryckman, K. K., Yu, Y., . . . Bao, W. (2020). Maternal cigarette smoking before and during pregnancy and the risk of preterm birth: A dose–response analysis of 25 million mother–infant pairs. PLoS Med.

शिकागो स्टाइल उद्धरण

Liu, Buyun, Guifeng Xu, Yangbo Sun, Xiu Qiu, Kelli K. Ryckman, Yongfu Yu, Linda G. Snetselaar, और Wei Bao. "Maternal Cigarette Smoking Before and During Pregnancy and the Risk of Preterm Birth: A Dose–response Analysis of 25 Million Mother–infant Pairs." PLoS Med 2020.

एमएलए उद्धरण

Liu, Buyun, et al. "Maternal Cigarette Smoking Before and During Pregnancy and the Risk of Preterm Birth: A Dose–response Analysis of 25 Million Mother–infant Pairs." PLoS Med 2020.