IRRI. (1990). IRRI 1989 - Planning for the 1990's. Philippines: IRRI.
Trích dẫn kiểu ChicagoIRRI. IRRI 1989 - Planning for the 1990's. Philippines: IRRI, 1990.
MLA引文IRRI. IRRI 1989 - Planning for the 1990's. Philippines: IRRI, 1990.
警告：這些引文格式不一定是100％准確.