APA (7th ed.) Citation

Vorrink, S. N., Kort, H. S., Troosters, T., & Lammers, J. J. (2011). Level of daily physical activity in individuals with COPD compared with healthy controls. Respiratory research, 12(1), 33. https://doi.org/10.1186/1465-9921-12-33

Chicago Style (17th ed.) Citation

Vorrink, Sigrid NW, Helianthe SM Kort, Thierry Troosters, and Jan-Willem J. Lammers. "Level of Daily Physical Activity in Individuals with COPD Compared with Healthy Controls." Respiratory Research 12, no. 1 (2011): 33. https://doi.org/10.1186/1465-9921-12-33.

MLA (9th ed.) Citation

Vorrink, Sigrid NW, et al. "Level of Daily Physical Activity in Individuals with COPD Compared with Healthy Controls." Respiratory Research, vol. 12, no. 1, 2011, p. 33, https://doi.org/10.1186/1465-9921-12-33.