Gaya APA
R.COVEY, S.
(2002).
THE 7 HABITS OF HIGHLY EFFECTIVE PEOPLE
.
tangerang:
KARISMA INTI ILMU.
Gaya MLA
R.COVEY, STEPHEN.
"THE 7 HABITS OF HIGHLY EFFECTIVE PEOPLE".
tangerang:
KARISMA INTI ILMU,
2002.
Text.