APA Style
Covey, Stephen R.. (1990).
Principle-centered Leadership .
London:
Simon and Schuster.
Chicago Style
Covey, Stephen R..
Principle-centered Leadership.
London:
Simon and Schuster,
1990.
Text.
MLA Style
Covey, Stephen R..
Principle-centered Leadership.
London:
Simon and Schuster,
1990.
Text.
Turabian Style
Covey, Stephen R..
Principle-centered Leadership.
London:
Simon and Schuster,
1990.
Print.