Smoking cessation improves both direct and indirect airway hyperresponsiveness in COPD.

MLA

Willemse, B. W. M., et al. “Smoking Cessation Improves Both Direct and Indirect Airway Hyperresponsiveness in COPD.” The European Respiratory Journal, vol. 24, no. 3, Sept. 2004, pp. 391–96. EBSCOhost, https://doi.org/10.1183/09031936.04.00117603.

APA

Willemse, B. W. M., ten Hacken, N. H. T., Rutgers, B., Lesman-Leegte, I. G. A. T., Timens, W., & Postma, D. S. (2004). Smoking cessation improves both direct and indirect airway hyperresponsiveness in COPD. The European Respiratory Journal, 24(3), 391–396. https://doi.org/10.1183/09031936.04.00117603

Chicago

Willemse, B W M, N H T ten Hacken, B Rutgers, I G A T Lesman-Leegte, W Timens, and D S Postma. 2004. “Smoking Cessation Improves Both Direct and Indirect Airway Hyperresponsiveness in COPD.” The European Respiratory Journal 24 (3): 391–96. doi:10.1183/09031936.04.00117603.