Gaya APA
Covey, Stephen R.. (1997).
the 7 habits of highly effective people (Cetakan 1).
Jakarta:
Simon & Schuster.
Gaya Chicago
Covey, Stephen R..
the 7 habits of highly effective people.
Cetakan 1
Jakarta:
Simon & Schuster,
1997.
Text.
Gaya MLA
Covey, Stephen R..
the 7 habits of highly effective people.
Cetakan 1
Jakarta:
Simon & Schuster,
1997.
Text.
Gaya Turabian
Covey, Stephen R..
the 7 habits of highly effective people.
Cetakan 1
Jakarta:
Simon & Schuster,
1997.
Print.