APA aipamena

WHO. (1991). WHO drug information; Vol.5(N.3)/1991. Geneva: WHO.

Chicago Style aipamena

WHO. WHO Drug Information; Vol.5(N.3)/1991. Geneva: WHO, 1991.

MLA aipamena

WHO. WHO Drug Information; Vol.5(N.3)/1991. Geneva: WHO, 1991.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.