According to [[David Kupelian]], marketing is the application of the knowledge of human [[psychology]] to the task of persuasion.<ref>{{cite book |title=The marketing of evil: How radicals, elitists, and pseudo-experts sell us corruption disguised as freedom |author=David Kupelian |publisher=WND Books |year=2005 |pages=99 |isbn=978-1-58182-459-9 |url=https://books.google.no/books?id=kQpXAAAAYAAJ}}</ref> | According to [[David Kupelian]], marketing is the application of the knowledge of human [[psychology]] to the task of persuasion.<ref>{{cite book |title=The marketing of evil: How radicals, elitists, and pseudo-experts sell us corruption disguised as freedom |author=David Kupelian |publisher=WND Books |year=2005 |pages=99 |isbn=978-1-58182-459-9 |url=https://books.google.no/books?id=kQpXAAAAYAAJ}}</ref> |