TY - CHAP A1 - Ajzen, I. T1 - The theory of planned behavior Y1 - 2012 A3 - Lange, P.A.M. A3 - Kruglanski, A.W. A3 - Higgins, E.T. T2 - Handbook of theories of social psychology CY - London PB - Sage SP - 438 EP - -459 ER -