Kelley, T., & Littman, J. (2008). The ten faces of innovation: IDEO's strategies for beating the devil's advocate & driving creativity throughout your organization. London: Profile books.
Chicago-tyylinen lähdeviittausKelley, Tom, ja Jonathan Littman. The Ten Faces of Innovation: IDEO's Strategies for Beating the Devil's Advocate & Driving Creativity Throughout Your Organization. London: Profile books, 2008.
MLA-viiteKelley, Tom, ja Jonathan Littman. The Ten Faces of Innovation: IDEO's Strategies for Beating the Devil's Advocate & Driving Creativity Throughout Your Organization. London: Profile books, 2008.
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