APA (7th ed.) Zitazioa
Cooper, B. (1997). European aids directory (4. ed.). Nam Publications.
Chicago Style (17th ed.) Zitazioa
Cooper, Brian. European Aids Directory. 4. ed. London: Nam Publications, 1997.
MLA (9th ed.) Zitazioa
Cooper, Brian. European Aids Directory. 4. ed. Nam Publications, 1997.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.