Dyfyniad APA

DE BONO EDWARD. (1987). LETTERS TO THINKERS: FURTHER THOUGHTS ON LATERAL THINKING. HARRAP LIMITED.

Dyfyniad Arddull Chicago

DE BONO EDWARD. LETTERS TO THINKERS: FURTHER THOUGHTS ON LATERAL THINKING. LONDON: HARRAP LIMITED, 1987.

Dyfyniad MLA

DE BONO EDWARD. LETTERS TO THINKERS: FURTHER THOUGHTS ON LATERAL THINKING. HARRAP LIMITED, 1987.

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