APA (7th ed.) Zitazioa
(1991). WORLD HEALTH ORGANIZATION GLOBAL AIDS STATISTICS.
Chicago Style (17th ed.) Zitazioa
WORLD HEALTH ORGANIZATION GLOBAL AIDS STATISTICS. 1991.
MLA (9th ed.) Zitazioa
WORLD HEALTH ORGANIZATION GLOBAL AIDS STATISTICS. 1991.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.