Cita APA (7th ed.)
De Bono, E. (1999). Six thinking hats (1st Back Bay pbk. ed., rev. and updated.). Back Bay Books.
Cita Chicago (17th ed.)
De Bono, Edward. Six Thinking Hats. 1st Back Bay pbk. ed., rev. and updated. Boston: Back Bay Books, 1999.
Cita MLA (9th ed.)
De Bono, Edward. Six Thinking Hats. 1st Back Bay pbk. ed., rev. and updated. Back Bay Books, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.