APA aipamena

World Health Organization. (2012). Bulletin of the World Health Organization. WHO.

Chicago Style aipamena

World Health Organization. Bulletin of the World Health Organization. Geneva, Switzerland: WHO, 2012.

MLA aipamena

World Health Organization. Bulletin of the World Health Organization. WHO, 2012.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.