APA način citiranja

Bell, M. C., & Busse, W. W. (2015). Is it Asthma or is it COPD: The Overlap Syndrome. J Allergy Clin Immunol Pract.

Čikaški stil citiranja

Bell, Matthew C., i William W. Busse. "Is It Asthma or Is It COPD: The Overlap Syndrome." J Allergy Clin Immunol Pract 2015.

MLA način citiranja

Bell, Matthew C., i William W. Busse. "Is It Asthma or Is It COPD: The Overlap Syndrome." J Allergy Clin Immunol Pract 2015.