APA (7th ed.) Citation

Barnes, N., Evans, T., & Thomas, S. (2009). Chronic Obstructive Pulmonary Disease. Current Medical Literature: Respiratory Medicine, 23(4), 89.

Chicago Style (17th ed.) Citation

Barnes, Neil, Timothy Evans, and Stephen Thomas. "Chronic Obstructive Pulmonary Disease." Current Medical Literature: Respiratory Medicine 23, no. 4 (2009): 89.

MLA (9th ed.) Citation

Barnes, Neil, et al. "Chronic Obstructive Pulmonary Disease." Current Medical Literature: Respiratory Medicine, vol. 23, no. 4, 2009, p. 89.