APA Citation

De Bono, E. (1990). Six thinking hats. london: Penguin Books.

Chicago Style Citation

De Bono, Edward. Six Thinking Hats. london: Penguin Books, 1990.

MLA Citation

De Bono, Edward. Six Thinking Hats. london: Penguin Books, 1990.

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