John J. Kerbs, Jennifer M. Jolley. “The Joy of Violence: What about Violence is Fun in Middle-School?”. 《American Journal of Criminal Justice》 32: 12. doi:10.1007/s12103-007-9011-1.지원되지 않는 변수 무시됨: |발표연도= (도움말)
K. S. Whitted, D. R. Dupper (2007). “Do Teachers Bully Students?: Findings From a Survey of Students in an Alternative Education Setting”. 《Education and Urban Society》 40: 329. doi:10.1177/0013124507304487.