APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.