Links for Bystander Effect and Kitty Genovese:

http://www.nsvrc.org/projects/150/bystander-intervention-resources

http://www.nsvrc.org/sites/default/files/Publications_NSVRC_Booklets_Text-Only_Engaging-Bystanders-in-Sexual-Violence-Prevention.pdf

http://www.uwlax.edu/faculty/cerbin/ls/PSY%20Research%20Lesson%20Model%20of%20Bystander%20Intervention.htm

http://changingminds.org/explanations/theories/bystander_effect.htm