1. The directive influence of attitudes on behavior;Ajzen,1996
2. Habitual and value-guided purchase behaviour;Biel;Ambio,2005
3. Gemiddeld inkomen; particuliere huishoudens naar diverse kenmerken;Centraal Bureau voor de Statistiek,2010
4. Environment and identity;Clayton,2012
5. Identity and the natural environment: The psychological significance of nature;Clayton,2003