Dyfyniad APA

De Bono, E. (1992). Sur/petition: Creating value monopolies when everyone else is merely competing. Harper collins.

Dyfyniad Arddull Chicago

De Bono, Edward. Sur/petition: Creating Value Monopolies When Everyone Else Is Merely Competing. New Delhi: Harper collins, 1992.

Dyfyniad MLA

De Bono, Edward. Sur/petition: Creating Value Monopolies When Everyone Else Is Merely Competing. Harper collins, 1992.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.