APA-čujuhus (7. p.)
De Bono, E. (1999). Six thinking hats (1st Back Bay pbk. ed., rev. and updated.). Back Bay Books.
Chicago-čujuhus (17. p.)
De Bono, Edward. Six Thinking Hats. 1st Back Bay pbk. ed., rev. and updated. Boston: Back Bay Books, 1999.
MLA-čujuhus (9. p.)
De Bono, Edward. Six Thinking Hats. 1st Back Bay pbk. ed., rev. and updated. Back Bay Books, 1999.
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