APA (7th ed.) Citation

De Bono, E. (2000). Six thinking hats / Edward de Bono (Revised and updated edition.). Penguin Life.

Chicago Style (17th ed.) Citation

De Bono, Edward. Six Thinking Hats / Edward De Bono. Revised and updated edition. London: Penguin Life, 2000.

MLA (9th ed.) Citation

De Bono, Edward. Six Thinking Hats / Edward De Bono. Revised and updated edition. Penguin Life, 2000.

Warning: These citations may not always be 100% accurate.