British Thoracic Society. (1997). BTS guidelines for the management of chronic obstructive pulmonary disease. BMJ Publ. Group.
Chicago-Zitierstil (17. Ausg.)British Thoracic Society. BTS Guidelines for the Management of Chronic Obstructive Pulmonary Disease. London: BMJ Publ. Group, 1997.
MLA-Zitierstil (9. Ausg.)British Thoracic Society. BTS Guidelines for the Management of Chronic Obstructive Pulmonary Disease. BMJ Publ. Group, 1997.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.