Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Kris Bosworth and Dorothy L. Espelage and Thomas R. Simon,Factors Associated with Bullying Behavior in Middle School Students,The Journal of Early Adolescence,0272-4316,SAGE Publications,1999-08,19,3,341-362,https://cir.nii.ac.jp/crid/1361699995626729984,https://doi.org/10.1177/0272431699019003003