Focus Medica & Barnes, P. J. (2007). Chronic obstructive pulmonary disease [computer file]: An overview. Focus Medica.
Citazione stile Chigago Style (17a edizione)Focus Medica e Peter J. Barnes. Chronic Obstructive Pulmonary Disease [computer File]: An Overview. Singapore: Focus Medica, 2007.
Citatione MLA (9a ed.)Focus Medica e Peter J. Barnes. Chronic Obstructive Pulmonary Disease [computer File]: An Overview. Focus Medica, 2007.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.