Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
"Wickramasinghe, Chandima S. M.",Slavery from known to unknown : a comparative study of slavery in ancient Greek poleis and ancient Sri Lanka,,John and Erica Hedges,2005,BAR international series,,1841717304,,https://cir.nii.ac.jp/crid/1130000796969798656