Cita APA (7th ed.)
Davey, S. (2002). State of the world's vaccines and immunization. World Health Organization.
Cita Chicago (17th ed.)
Davey, Sheila. State of the World's Vaccines and Immunization. Geneva: World Health Organization, 2002.
Cita MLA (9th ed.)
Davey, Sheila. State of the World's Vaccines and Immunization. World Health Organization, 2002.
Atenció: Aquestes cites poden no estar 100% correctes.