FAO. (1987). FAO agriculture series; N21: The state of food and agriculture. Rome: FAO.
Trích dẫn kiểu ChicagoFAO. FAO Agriculture Series; N21: The State of Food and Agriculture. Rome: FAO, 1987.
MLA CitationFAO. FAO Agriculture Series; N21: The State of Food and Agriculture. Rome: FAO, 1987.
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