APA (7th ed.) Citation

Xie, X., Zhong, Z., Zhao, W., Wu, S., & Liu, J. (2021). The Differences and Changes of Semi-Quantitative and Quantitative CT Features of Coronavirus Disease 2019 Pneumonia in Patients With or Without Smoking History. Frontiers in medicine, 8, 663514. https://doi.org/10.3389/fmed.2021.663514

Chicago Style (17th ed.) Citation

Xie, Xingzhi, Zheng Zhong, Wei Zhao, Shangjie Wu, and Jun Liu. "The Differences and Changes of Semi-Quantitative and Quantitative CT Features of Coronavirus Disease 2019 Pneumonia in Patients With or Without Smoking History." Frontiers in Medicine 8 (2021): 663514. https://doi.org/10.3389/fmed.2021.663514.

MLA (9th ed.) Citation

Xie, Xingzhi, et al. "The Differences and Changes of Semi-Quantitative and Quantitative CT Features of Coronavirus Disease 2019 Pneumonia in Patients With or Without Smoking History." Frontiers in Medicine, vol. 8, 2021, p. 663514, https://doi.org/10.3389/fmed.2021.663514.