de Bono, E. (1991). Opportunities: A handbook of business opportunity search. Penguin Books.
Chicago Style (17th ed.) Citationde Bono, Edward. Opportunities: A Handbook of Business Opportunity Search. London: Penguin Books, 1991.
MLA (9th ed.) Citationde Bono, Edward. Opportunities: A Handbook of Business Opportunity Search. Penguin Books, 1991.
Warning: These citations may not always be 100% accurate.