Gaya APA
Covey, Stephen R.. (1990).
The Seven Habits of Higly Effective People (Cet. 1).
New York:
A Fireside Book.
Gaya Chicago
Covey, Stephen R..
The Seven Habits of Higly Effective People.
Cet. 1
New York:
A Fireside Book,
1990.
Text.
Gaya MLA
Covey, Stephen R..
The Seven Habits of Higly Effective People.
Cet. 1
New York:
A Fireside Book,
1990.
Text.
Gaya Turabian
Covey, Stephen R..
The Seven Habits of Higly Effective People.
Cet. 1
New York:
A Fireside Book,
1990.
Print.