APA
De Bono E., . (1990). Edward De Bono's masterthinkers handbook. London: Penguin books.
Chicago
De Bono Edward, . 1990. Edward De Bono's masterthinkers handbook. London: Penguin books.
Harvard
De Bono E., . (1990). Edward De Bono's masterthinkers handbook. London: Penguin books.
MLA
De Bono Edward, . Edward De Bono's masterthinkers handbook. London: Penguin books. 1990.
