著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL
"Weliwita, Ananda and Epaarachchi, Roshen and Institute of Policy Studies (Colombo, Sri Lanka)",Forward contracts : a market based alternative to government intervention in agriculture marketing in Sri Lanka,,Institute of Policy Studies,2003,Research studies,,955870816X,,https://cir.nii.ac.jp/crid/1130000795948322304