Gaya APA
SINEK,SIMON. (2009).
START WITH WHY .
new york:
Penguin.
Gaya Chicago
SINEK,SIMON.
START WITH WHY.
new york:
Penguin,
2009.
FIKSI.
Gaya MLA
SINEK,SIMON.
START WITH WHY.
new york:
Penguin,
2009.
FIKSI.
Gaya Turabian
SINEK,SIMON.
START WITH WHY.
new york:
Penguin,
2009.
FIKSI.