著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) WILLIAMS K.,Social loafing and social compensation : The effects of expectations of co-worker performance,Journal of Personality and Social Psychology,,,1991,61,4,570-581,https://cir.nii.ac.jp/crid/1571417124239299840,