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
"Elšík, Viktor and Matras, Yaron",Markedness and language change : the Romani sample,,Mouton de Gruyter,2006,Empirical approaches to language typology,,3110184524,,https://cir.nii.ac.jp/crid/1130000797549805568