APA aipamena

FAO. (1991). World soil resources reports N.71: Agro-ecological land resources assessment for agricultural development planning. Rome: FAO.

Chicago Style aipamena

FAO. World Soil Resources Reports N.71: Agro-ecological Land Resources Assessment for Agricultural Development Planning. Rome: FAO, 1991.

MLA aipamena

FAO. World Soil Resources Reports N.71: Agro-ecological Land Resources Assessment for Agricultural Development Planning. Rome: FAO, 1991.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.