APA
Edward de Bono, . (1979). Practical Thinking. : Pelican Penguin Books.
Chicago
Edward de Bono, . 1979. Practical Thinking. : Pelican Penguin Books.
Harvard
Edward de Bono, . (1979). Practical Thinking. : Pelican Penguin Books.
MLA
Edward de Bono, . Practical Thinking. : Pelican Penguin Books. 1979.
