Cita APA (7a ed.)

Foster, D., Walker, A., Paul, J., Griffiths, D., Knox, K., Peto, T., & Crook, D. (2011). Reduction in invasive pneumococcal disease following implementation of the conjugate vaccine in the Oxfordshire region, England.

Cita Chicago Style (17a ed.)

Foster, D., A. Walker, J. Paul, D. Griffiths, K. Knox, T. Peto, y D. Crook. Reduction in Invasive Pneumococcal Disease Following Implementation of the Conjugate Vaccine in the Oxfordshire Region, England. 2011.

Cita MLA (9a ed.)

Foster, D., et al. Reduction in Invasive Pneumococcal Disease Following Implementation of the Conjugate Vaccine in the Oxfordshire Region, England. 2011.