Cita APA (7th ed.)
ebrary, Inc, Barnes, P. J., Hansel, T. T., & Kon, O. M. (2008). Chronic obstructive pulmonary disease: (COPD). Oxford University Press.
Cita Chicago (17th ed.)
ebrary, Inc, Peter J. Barnes, T. T. Hansel, i Onn Min Kon. Chronic Obstructive Pulmonary Disease: (COPD). Oxford ; New York: Oxford University Press, 2008.
Cita MLA (9th ed.)
ebrary, Inc, et al. Chronic Obstructive Pulmonary Disease: (COPD). Oxford University Press, 2008.
Atenció: Aquestes cites poden no estar 100% correctes.