Gaya APA
Covey, Stephen R.. (2016).
7 Habits of Highly Effective People An Effective Life .
USA:
Mango Media.
Gaya Chicago
Covey, Stephen R..
7 Habits of Highly Effective People An Effective Life.
USA:
Mango Media,
2016.
Buku.
Gaya MLA
Covey, Stephen R..
7 Habits of Highly Effective People An Effective Life.
USA:
Mango Media,
2016.
Buku.
Gaya Turabian
Covey, Stephen R..
7 Habits of Highly Effective People An Effective Life.
USA:
Mango Media,
2016.
Buku.