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
"Labov, William","Contraction, deletion, and inherent variability of the English copula",,"Prepared by ERIC Document Reproduction Service, operated by Leasco Information Products",,ERIC reports,,,,https://cir.nii.ac.jp/crid/1130282271981992576