Παραπομπή APA

FAO. (1991). World soil resources reports N.71.4: Agro-ecological land resources assessment for agricultural development planning. Rome: FAO.

Παραπομπή Chicago Style

FAO. World Soil Resources Reports N.71.4: Agro-ecological Land Resources Assessment for Agricultural Development Planning. Rome: FAO, 1991.

Παραπομπή MLA

FAO. World Soil Resources Reports N.71.4: Agro-ecological Land Resources Assessment for Agricultural Development Planning. Rome: FAO, 1991.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.