Dyfyniad APA

De Bono Edward. (1990). Lateral thinking: A textbook of creativity. Penguin Books Publisher, Pearson.

Dyfyniad Arddull Chicago

De Bono Edward. Lateral Thinking: A Textbook of Creativity. London ,England: Penguin Books Publisher, Pearson, 1990.

Dyfyniad MLA

De Bono Edward. Lateral Thinking: A Textbook of Creativity. Penguin Books Publisher, Pearson, 1990.

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