APA (7th ed.) Citation

Keeley, D., & Osman, L. (2001). Dysfunctional breathing and asthma. It is important to tell the difference.

Chicago Style (17th ed.) Citation

Keeley, D., and L. Osman. Dysfunctional Breathing and Asthma. It Is Important to Tell the Difference. 2001.

MLA (9th ed.) Citation

Keeley, D., and L. Osman. Dysfunctional Breathing and Asthma. It Is Important to Tell the Difference. 2001.