De Bono, E. (1999). Six thinking hats (Rev. and updated ed.). Back Bay Books.
Chicago Style (17th ed.) CitationDe Bono, Edward. Six Thinking Hats. Rev. and updated ed. Boston: Back Bay Books, 1999.
MLA (9th ed.) CitationDe Bono, Edward. Six Thinking Hats. Rev. and updated ed. Back Bay Books, 1999.
Warning: These citations may not always be 100% accurate.