APA aipamena

(2007). World health statistics 2007 <i>en</i>.

Chicago Style aipamena

World Health Statistics 2007 <i>en</i>. 2007.

MLA aipamena

World Health Statistics 2007 <i>en</i>. 2007.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.