IRRI. (1979). Report of the cropping systems working group. Philippines: IRRI.
Trích dẫn kiểu ChicagoIRRI. Report of the Cropping Systems Working Group. Philippines: IRRI, 1979.
MLA引文IRRI. Report of the Cropping Systems Working Group. Philippines: IRRI, 1979.
警告:這些引文格式不一定是100%准確.