Gaya APA
De Bono, Edward. (1986).
Opportunities: A Handbook of Business Opportunity Search. .
s.l.:
Penguin Books.
Gaya Chicago
De Bono, Edward.
Opportunities: A Handbook of Business Opportunity Search..
s.l.:
Penguin Books,
1986.
Text.
Gaya MLA
De Bono, Edward.
Opportunities: A Handbook of Business Opportunity Search..
s.l.:
Penguin Books,
1986.
Text.
Gaya Turabian
De Bono, Edward.
Opportunities: A Handbook of Business Opportunity Search..
s.l.:
Penguin Books,
1986.
Print.