APA aipamena

FAO. (1989). FAO conservation guide N.21: Role of forestry in combating desertification. Rome: FAO.

Chicago Style aipamena

FAO. FAO Conservation Guide N.21: Role of Forestry in Combating Desertification. Rome: FAO, 1989.

MLA aipamena

FAO. FAO Conservation Guide N.21: Role of Forestry in Combating Desertification. Rome: FAO, 1989.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.