De Bono, E. (1993). Sur/petition: Creating value monopolies when everyone else is merely competing. HarperBusiness, Profile Books.
Cita Chicago (17th ed.)De Bono, Edward. Sur/petition: Creating Value Monopolies When Everyone Else Is Merely Competing. New York, NY : London: HarperBusiness, Profile Books, 1993.
Cita MLA (8th ed.)De Bono, Edward. Sur/petition: Creating Value Monopolies When Everyone Else Is Merely Competing. HarperBusiness, Profile Books, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.