Gaya APA
Covey, S, R., Budijanto, . (1997).
The 7 habits of highly effective people (Ed. Revisi).
Jakarta:
Binarupa Aksara.
Gaya MLA
Covey, Stephen, R.., Budijanto, .
"The 7 habits of highly effective people".
Ed. Revisi
Jakarta:
Binarupa Aksara,
1997.
UMUM.