Cita APA (7a ed.)

De Bono, E. (1986). Opportunities: A handbook of business opportunity search. Penguin Books.

Cita Chicago Style (17a ed.)

De Bono, Edward. Opportunities: A Handbook of Business Opportunity Search. Harmondsworth [etc.]: Penguin Books, 1986.

Cita MLA (9a ed.)

De Bono, Edward. Opportunities: A Handbook of Business Opportunity Search. Penguin Books, 1986.