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