APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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

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