APA (7th ed.) Citation

Cheng, Y. J., Macera, C. A., Addy, C. L., Sy, F. S., Wieland, D., & Blair, S. N. (2003). Effects of Physical activity on exercise tests and respiratory function. British Journal of Sports Medicine, 37(6), 521. https://doi.org/10.1136/bjsm.37.6.521

Chicago Style (17th ed.) Citation

Cheng, Y. J., C. A. Macera, C. L. Addy, F. S. Sy, D. Wieland, and S. N. Blair. "Effects of Physical Activity on Exercise Tests and Respiratory Function." British Journal of Sports Medicine 37, no. 6 (2003): 521. https://doi.org/10.1136/bjsm.37.6.521.

MLA (9th ed.) Citation

Cheng, Y. J., et al. "Effects of Physical Activity on Exercise Tests and Respiratory Function." British Journal of Sports Medicine, vol. 37, no. 6, 2003, p. 521, https://doi.org/10.1136/bjsm.37.6.521.