APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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