Gaya APA
Covey, Sean. (1998).
The 7 Habits of Highly Effective Teens .
Amerika Serikat:
Fireside.
Gaya Chicago
Covey, Sean.
The 7 Habits of Highly Effective Teens.
Amerika Serikat:
Fireside,
1998.
Text.
Gaya MLA
Covey, Sean.
The 7 Habits of Highly Effective Teens.
Amerika Serikat:
Fireside,
1998.
Text.
Gaya Turabian
Covey, Sean.
The 7 Habits of Highly Effective Teens.
Amerika Serikat:
Fireside,
1998.
Print.