APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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

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