APA (7th ed.) Citation

De Bono. (1985). Conflicts: A better way to resolve them. Penguin Books.

Chicago Style (17th ed.) Citation

De Bono. Conflicts: A Better Way to Resolve Them. London: Penguin Books, 1985.

MLA (8th ed.) Citation

De Bono. Conflicts: A Better Way to Resolve Them. Penguin Books, 1985.