FAO. (2002). Global agro- ecological assessment for agriculture in the twenty- first century. Rome: Food and Agriculture Organization of the United Nations.
Trích dẫn kiểu ChicagoFAO. Global Agro- Ecological Assessment for Agriculture in the Twenty- First Century. Rome: Food and Agriculture Organization of the United Nations, 2002.
MLA引文FAO. Global Agro- Ecological Assessment for Agriculture in the Twenty- First Century. Rome: Food and Agriculture Organization of the United Nations, 2002.
警告：这些引文格式不一定是100％准确.