Gaya APA
COVEY, D, S, R.
(2013).
THE WISDOM AND TEACHINGS OF STEPHEN R. COVEY
.
Jakarta:
Dunamis intra sarana.
Gaya MLA
COVEY, Dr., STEPHEN, R..
"THE WISDOM AND TEACHINGS OF STEPHEN R. COVEY".
Jakarta:
Dunamis intra sarana,
2013.
.