A theory of cognitive dissonance. Festinger, L. Stanford university press, USA, 1962.
bibtex   
@book{Festinger1962A,
  author = {Festinger, Leon},
  title = {A theory of cognitive dissonance},
  publisher = {Stanford university press},
  address = {USA},
  year = {1962},
  isbn = {0804709114},
  keywords = {Qualitative Research},
  language = {English}
}

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