FAO. (1991). FAO terminology bulletin; N.20; rev.9: Names of countries. Rome: FAO.
Trích dẫn kiểu ChicagoFAO. FAO Terminology Bulletin; N.20; Rev.9: Names of Countries. Rome: FAO, 1991.
MLA引文FAO. FAO Terminology Bulletin; N.20; Rev.9: Names of Countries. Rome: FAO, 1991.
警告:这些引文格式不一定是100%准确.