APA citiranje

Madhi, S. A., Levine, O. S., & Cherian, T. (2008). Pneumococcal conjugate vaccine is efficacious and effective in reducing the burden of pneumonia. World Health Organization.

Citação norma Chicago

Madhi, Shabir A., Orin S. Levine, and Thomas Cherian. Pneumococcal Conjugate Vaccine Is Efficacious and Effective in Reducing the Burden of Pneumonia. World Health Organization, 2008.

MLA citiranje

Madhi, Shabir A., Orin S. Levine, and Thomas Cherian. Pneumococcal Conjugate Vaccine Is Efficacious and Effective in Reducing the Burden of Pneumonia. World Health Organization, 2008.