Rust, Mary C. 1996. “Social Identity and Social Categorization”. Department of Psychology. University of Delaware. Referenced from www.proquest.com: Social identity and social categorization. Reference Link
Polzer, Jeffrey Thomas. 1995. “Group Identification and Intergroup Conflict: The Mystery of Multiple Group Boundaries”. Northwestern University. Referenced from www.proquest.com: Group identification and intergroup conflict: The mystery of multiple group boundaries. Reference Link
