APA (7th ed.) Citation

DE BONO. (2000). Six thinking hats. London Penguin Books 2000.

Chicago Style (17th ed.) Citation

DE BONO. Six Thinking Hats. London: London Penguin Books 2000, 2000.

MLA (8th ed.) Citation

DE BONO. Six Thinking Hats. London Penguin Books 2000, 2000.

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