Which consumer behavior theories and concepts may have been used to inquire into consumers' perception, attitudes, motivation, cultural and individual factors in buying a product and why? Include 8 sources of information and reference these in accordance with the Kaplan Harvard Referencing Style. These may include websites, social media sites, industry reports, census data, journal articles, and newspaper articles. These references should be presented as in-text citations and a reference list at the end of your written analysis (not included in the page limit). Wikipedia and other 'popular' sites are not to be used.