Mouthpiece ventilation.

MLA

Ogna, Adam, and Frederic Lofaso. “Mouthpiece Ventilation.” Chronic Respiratory Disease, vol. 13, no. 4, Nov. 2016, pp. 385–86. EBSCOhost, https://doi.org/10.1177/1479972316661928.

APA

Ogna, A., & Lofaso, F. (2016). Mouthpiece ventilation. Chronic Respiratory Disease, 13(4), 385–386. https://doi.org/10.1177/1479972316661928

Chicago

Ogna, Adam, and Frederic Lofaso. 2016. “Mouthpiece Ventilation.” Chronic Respiratory Disease 13 (4): 385–86. doi:10.1177/1479972316661928.