(1997). Annual report 1997 (International Institute of Tropical Agriculture). Nigeria: IITA.
シカゴスタイル引用形Annual Report 1997 (International Institute of Tropical Agriculture). Nigeria: IITA, 1997.
MLA引用形式Annual Report 1997 (International Institute of Tropical Agriculture). Nigeria: IITA, 1997.
警告: この引用は必ずしも正確ではありません.