Styl cytowania APA

(2004). Two countries re-infected with polio, as Nigerian state resumes vaccinations. World Health Organization.

Styl cytowania Chicago

Two Countries Re-infected With Polio, As Nigerian State Resumes Vaccinations. World Health Organization, 2004.

Styl cytowania MLA

Two Countries Re-infected With Polio, As Nigerian State Resumes Vaccinations. World Health Organization, 2004.

Uwaga: Te cytaty mogą odróżniać się od wytycznej twojego fakultetu..