DE BONO EDWARD. (1990). WORDPOWER - AN ILLUSTRATED DICTIONERY OF VITAL WORDS. PENGUIN BOOKS INDIA (P) LTD.
Chicago-viite (17. p.)DE BONO EDWARD. WORDPOWER - AN ILLUSTRATED DICTIONERY OF VITAL WORDS. LONDON: PENGUIN BOOKS INDIA (P) LTD, 1990.
MLA-viite (9. p.)DE BONO EDWARD. WORDPOWER - AN ILLUSTRATED DICTIONERY OF VITAL WORDS. PENGUIN BOOKS INDIA (P) LTD, 1990.
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