Cita APA (7a ed.)

De Bono, E. (2000). Six thinking hats (Revised and updated [edition].). Penguin Life, an Imprint of Penguin Books.

Cita Chicago Style (17a ed.)

De Bono, Edward. Six Thinking Hats. Revised and updated [edition]. [London]: Penguin Life, an Imprint of Penguin Books, 2000.

Cita MLA (9a ed.)

De Bono, Edward. Six Thinking Hats. Revised and updated [edition]. Penguin Life, an Imprint of Penguin Books, 2000.