Gaya APA
Covey, S, R. et al
(2013).
The wisdom and teaching of Stephen R. Covey
.
Jakarta:
Dunamis Intra Sarana.
Gaya MLA
Covey, Stephen, R.. et al.
"The wisdom and teaching of Stephen R. Covey".
Jakarta:
Dunamis Intra Sarana,
2013.
FE-Manajemen.