Gaya APA
Covey, Stephen R. (1989).
The seven habits of highly effective people : restoring the character ethic (1).
New York:
A Fireside Book.
Gaya Chicago
Covey, Stephen R.
The seven habits of highly effective people : restoring the character ethic.
1
New York:
A Fireside Book,
1989.
Text.
Gaya MLA
Covey, Stephen R.
The seven habits of highly effective people : restoring the character ethic.
1
New York:
A Fireside Book,
1989.
Text.
Gaya Turabian
Covey, Stephen R.
The seven habits of highly effective people : restoring the character ethic.
1
New York:
A Fireside Book,
1989.
Print.