Cita APA (7a ed.)

Brueggemann, A., Pai, R., Crook, D., & Beall, B. (2007). Vaccine escape recombinants emerge after pneumococcal vaccination in the United States.

Cita Chicago Style (17a ed.)

Brueggemann, A., R. Pai, D. Crook, y B. Beall. Vaccine Escape Recombinants Emerge After Pneumococcal Vaccination in the United States. 2007.

Cita MLA (9a ed.)

Brueggemann, A., et al. Vaccine Escape Recombinants Emerge After Pneumococcal Vaccination in the United States. 2007.