Cita APA

(2007). Global burden of COPD has been underestimated. BMJ Publishing Group Ltd.

Chicago Style Citation

Global Burden of COPD Has Been Underestimated. BMJ Publishing Group Ltd, 2007.

Cita MLA

Global Burden of COPD Has Been Underestimated. BMJ Publishing Group Ltd, 2007.

Atenció: Aquestes cites poden no estar 100% correctes.