Cita APA (7th ed.)

(2002). Vacines and Biologicals Who vaccine preventable diasease monitoring system 2002 global summary. WHO.

Cita Chicago (17th ed.)

Vacines and Biologicals Who Vaccine Preventable Diasease Monitoring System 2002 Global Summary. Washington: WHO, 2002.

Cita MLA (9th ed.)

Vacines and Biologicals Who Vaccine Preventable Diasease Monitoring System 2002 Global Summary. WHO, 2002.