APA Style
Covey, Stephen R. (1991).
Principle - centred leadership (_).
:
Sinmon & Schuster.
Chicago Style
Covey, Stephen R.
Principle - centred leadership.
_
:
Sinmon & Schuster,
1991.
.
MLA Style
Covey, Stephen R.
Principle - centred leadership.
_
:
Sinmon & Schuster,
1991.
.
Turabian Style
Covey, Stephen R.
Principle - centred leadership.
_
:
Sinmon & Schuster,
1991.
.