APA Style
De Bono, Edward. (1999).
Six thinking hats (Revised and Updated).
London:
Back Bay Books.
Chicago Style
De Bono, Edward.
Six thinking hats.
Revised and Updated
London:
Back Bay Books,
1999.
Text.
MLA Style
De Bono, Edward.
Six thinking hats.
Revised and Updated
London:
Back Bay Books,
1999.
Text.
Turabian Style
De Bono, Edward.
Six thinking hats.
Revised and Updated
London:
Back Bay Books,
1999.
Print.