APA aipamena

FAO. (1991). FAO yearbook trade 1991, Vol.45. Rome: FAO.

Chicago Style aipamena

FAO. FAO Yearbook Trade 1991, Vol.45. Rome: FAO, 1991.

MLA aipamena

FAO. FAO Yearbook Trade 1991, Vol.45. Rome: FAO, 1991.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.