APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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