@inbook {Cooper2004, title = {Attitudes, norms and social groups}, booktitle = {Social Cognition}, year = {2004}, pages = {244{\textendash}267}, publisher = {Blackwell}, organization = {Blackwell}, address = {Malden, MA}, author = {Cooper, Joel and Kimberly A. Kelly and Kimberlee Weaver}, editor = {Marilynn B. Brewer and Miles Hewstone} }