Gaya APA
Covey, Stephen R.. ().
The 7 Habits of highly effective people : powerful lessons in personal change (Ed. 1.).
London:
Simon Schuster.
Gaya Chicago
Covey, Stephen R..
The 7 Habits of highly effective people : powerful lessons in personal change.
Ed. 1.
London:
Simon Schuster,
.
Text.
Gaya MLA
Covey, Stephen R..
The 7 Habits of highly effective people : powerful lessons in personal change.
Ed. 1.
London:
Simon Schuster,
.
Text.
Gaya Turabian
Covey, Stephen R..
The 7 Habits of highly effective people : powerful lessons in personal change.
Ed. 1.
London:
Simon Schuster,
.
Print.