Cita APA (7a ed.)

Pollard, A., Booy, R., Nadel, S., & Levin, M. (1996). Secondary cases of meningococcal disease.

Cita Chicago Style (17a ed.)

Pollard, A., R. Booy, S. Nadel, y M. Levin. Secondary Cases of Meningococcal Disease. 1996.

Cita MLA (9a ed.)

Pollard, A., et al. Secondary Cases of Meningococcal Disease. 1996.