EDWARD DE BONO, . (1970). LATERAL THINKING. : PENGUIN BOOKS LTD. 80 STRAND, LONDON WCZR ORL. ENGLAND.
EDWARD DE BONO, . 1970. LATERAL THINKING. : PENGUIN BOOKS LTD. 80 STRAND, LONDON WCZR ORL. ENGLAND.
EDWARD DE BONO, . LATERAL THINKING. : PENGUIN BOOKS LTD. 80 STRAND, LONDON WCZR ORL. ENGLAND. 1970.
