APA (7th ed.) Citation

De Bono, E. (1986). The happiness purpose. Penguin.

Chicago Style (17th ed.) Citation

De Bono, Edward. The Happiness Purpose. Middlesex: Penguin, 1986.

MLA (8th ed.) Citation

De Bono, Edward. The Happiness Purpose. Penguin, 1986.

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