De Bono, E. (1978). Opportunities: A handbook of business opportunity search. Associated Business Programmes.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDe Bono, Edward. Opportunities: A Handbook of Business Opportunity Search. London: Associated Business Programmes, 1978.
एमएलए (9वां संस्करण) प्रशस्ति पत्रDe Bono, Edward. Opportunities: A Handbook of Business Opportunity Search. Associated Business Programmes, 1978.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.
