De Bono, E. (1978). Opportunities: A handbook of business opportunity search. Associated Business Programmes.
Chicago-čujuhus (17. p.)De Bono, Edward. Opportunities: A Handbook of Business Opportunity Search. London: Associated Business Programmes, 1978.
MLA-čujuhus (9. p.)De Bono, Edward. Opportunities: A Handbook of Business Opportunity Search. Associated Business Programmes, 1978.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.
