Gaya APA
COVEY, Stephen R.. (1990).
The seven habits of highly effective people : restoring the character ethic .
New York:
Simo Schuster.
Gaya Chicago
COVEY, Stephen R..
The seven habits of highly effective people : restoring the character ethic.
New York:
Simo Schuster,
1990.
Text.
Gaya MLA
COVEY, Stephen R..
The seven habits of highly effective people : restoring the character ethic.
New York:
Simo Schuster,
1990.
Text.
Gaya Turabian
COVEY, Stephen R..
The seven habits of highly effective people : restoring the character ethic.
New York:
Simo Schuster,
1990.
Print.