APA Style
De Bono, Edward. (1999).
Six thinking hats (3rd ed).
:
Penguin.
Chicago Style
De Bono, Edward.
Six thinking hats.
3rd ed
:
Penguin,
1999.
.
MLA Style
De Bono, Edward.
Six thinking hats.
3rd ed
:
Penguin,
1999.
.
Turabian Style
De Bono, Edward.
Six thinking hats.
3rd ed
:
Penguin,
1999.
.