@Book{Hair.2009, author = {Hair, J. and Anderson, R. and Babin, B.}, title = {Multivariate Data Analysis}, year = {2009}, number = {}, url = {}, const = {\ text} } @Book{anderson2001kognitive, author = {Anderson, John R.}, title = {Kognitive Psychologie}, year = {2001}, number = {}, url = {http://www.amazon.de/Kognitive-Psychologie-John-R-Anderson/dp/382741024X}, const = {\ text} }