Lua APA (7ú heag.)
De Bono, E. (1999). Six thinking hats (1st Back Bay pbk. ed., rev. and updated.). Back Bay Books.
Lua i Stíl Chicago (17ú heag.)
De Bono, Edward. Six Thinking Hats. 1st Back Bay pbk. ed., rev. and updated. Boston: Back Bay Books, 1999.
Lua MLA (9ú heag.)
De Bono, Edward. Six Thinking Hats. 1st Back Bay pbk. ed., rev. and updated. Back Bay Books, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.