Gaya APA
Covey, S.
(1998).
The 7 Habits of Highly Effective Teens
(
Cet. 1)
.
New york:
Fireside Book.
Gaya MLA
Covey, Sean.
"The 7 Habits of Highly Effective Teens".
Cet. 1
New york:
Fireside Book,
1998.
Text.