FAO. (1999). Food, nutrition and agriculture; N23; 1999. Rome: FAO.
Chicago Style aipamenaFAO. Food, Nutrition and Agriculture; N23; 1999. Rome: FAO, 1999.
MLA aipamenaFAO. Food, Nutrition and Agriculture; N23; 1999. Rome: FAO, 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.