DE BONO EDWARD. (1987). LATERAL THINKING FOR MANAGEMENT. PENGUIN BOOKS INDIA (P) LTD.
Lua i Stíl Chicago (17ú heag.)DE BONO EDWARD. LATERAL THINKING FOR MANAGEMENT. ENGLAND: PENGUIN BOOKS INDIA (P) LTD, 1987.
Lua MLA (9ú heag.)DE BONO EDWARD. LATERAL THINKING FOR MANAGEMENT. PENGUIN BOOKS INDIA (P) LTD, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.