APA (7th ed.) Citation

De Bono, E. (1984). Children solve problems. Penguin Books.

Chicago Style (17th ed.) Citation

De Bono, Edward. Children Solve Problems. Harmondsworth [u.a.]: Penguin Books, 1984.

MLA (9th ed.) Citation

De Bono, Edward. Children Solve Problems. Penguin Books, 1984.