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
"Gunawardena, P. J. and Chandrasiri, Athula and Agrarian Research and Training Institute",Factors influencing vegetable prices : a study of the vegetable economy in Sri Lanka,,Agrarian Research and Training Institute,1980,Research study series,,,,https://cir.nii.ac.jp/crid/1130000797953565696