Gaya APA
Kotter, J, P., Cohen, D, S.
(1947).
The heart of change
.
United States of Amerika:
Harvad Busiess.
Gaya MLA
Kotter, John, P.., Cohen, Dan, S..
"The heart of change".
United States of Amerika:
Harvad Busiess,
1947.
UMUM.