Cita APA (7a ed.)

Powell, H., Smart, J., Wood, L. G., Grissell, T., Shafren, D. R., Hensley, M. J., & Gibson, P. G. (2008). Validity of the common cold questionnaire (CCQ) in asthma exacerbations. Public Library of Science (PLoS).

Cita Chicago Style (17a ed.)

Powell, Heather, Joanne Smart, Lisa G. Wood, Terry Grissell, Darren R. Shafren, Michael J. Hensley, y Peter G. Gibson. Validity of the Common Cold Questionnaire (CCQ) in Asthma Exacerbations. Public Library of Science (PLoS), 2008.

Cita MLA (8a ed.)

Powell, Heather, et al. Validity of the Common Cold Questionnaire (CCQ) in Asthma Exacerbations. Public Library of Science (PLoS), 2008.