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TomaszT.WitkowskiTomaszT., Thirty-Five Years of Research on Neuro-Linguistic Programming. NLP Research Data Base. State of the Art or Pseudoscientific Decoration?, „Polish Psychological Bulletin”, 41 (2), 2010, DOI: 10.2478/v10059-010-0008-0, ISSN0079-2993 [dostęp 2019-01-30].1 stycznia