Cita APA

Davey, S., & Davey, S. (2003). State of the world's vaccines and immunization (rev. edition.). Geneva: World Health Organization.

Citación estilo Chicago

Davey, Sheila, y Sheila Davey. State of the World's Vaccines and Immunization. rev. edition. Geneva: World Health Organization, 2003.

Cita MLA

Davey, Sheila, y Sheila Davey. State of the World's Vaccines and Immunization. rev. edition. Geneva: World Health Organization, 2003.