APA (7th ed.) Citation

De Bono. (1977). The happiness purpose. Penguin Bks.

Chicago Style (17th ed.) Citation

De Bono. The Happiness Purpose. Middlesex: Penguin Bks, 1977.

MLA (8th ed.) Citation

De Bono. The Happiness Purpose. Penguin Bks, 1977.

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