APA Style
Covey, Stephen R.. (1992).
Principle-centered leadership (null).
New York:
Fireside.
Chicago Style
Covey, Stephen R..
Principle-centered leadership.
null
New York:
Fireside,
1992.
Text.
MLA Style
Covey, Stephen R..
Principle-centered leadership.
null
New York:
Fireside,
1992.
Text.
Turabian Style
Covey, Stephen R..
Principle-centered leadership.
null
New York:
Fireside,
1992.
Print.