Citazione APA

CALVERLEY, P. (2000). Supplementary oxygen therapy in COPD: Is it really useful? BMJ Group.

Stile di citazione Chicago

CALVERLEY, P. Supplementary Oxygen Therapy in COPD: Is It Really Useful? BMJ Group, 2000.

Citazione MLA

CALVERLEY, P. Supplementary Oxygen Therapy in COPD: Is It Really Useful? BMJ Group, 2000.

Attenzione: Queste citazioni potrebbero non essere precise al 100%.