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
"Perera, M. P. and Abeyratne, Fredrick",The citronella industry in the Hambantota District,,Agrarian Research & Training Institute,1978,Research study series,,,,https://cir.nii.ac.jp/crid/1130282269936667776