APA Style
Edward, De Bono. (2000).
Six Thinking Hats .
:
Pinguin Books.
Chicago Style
Edward, De Bono.
Six Thinking Hats.
:
Pinguin Books,
2000.
Text.
MLA Style
Edward, De Bono.
Six Thinking Hats.
:
Pinguin Books,
2000.
Text.
Turabian Style
Edward, De Bono.
Six Thinking Hats.
:
Pinguin Books,
2000.
Print.