APA (7th ed.) Citation

DN, A., EO, B., & NM, R. (2021). Parapneumonic Effusion and Empyema. Clinics in chest medicine, 42(4), 637. https://doi.org/10.1016/j.ccm.2021.08.001

Chicago Style (17th ed.) Citation

DN, Addala, Bedawi EO, and Rahman NM. "Parapneumonic Effusion and Empyema." Clinics in Chest Medicine 42, no. 4 (2021): 637. https://doi.org/10.1016/j.ccm.2021.08.001.

MLA (9th ed.) Citation

DN, Addala, et al. "Parapneumonic Effusion and Empyema." Clinics in Chest Medicine, vol. 42, no. 4, 2021, p. 637, https://doi.org/10.1016/j.ccm.2021.08.001.