Gaya APA
Kouzes, J, M., Posner, B, Z.
(2003).
Leadership the Challenge Workbook
.
San Fransisco:
Jossey-Bass.
Gaya MLA
Kouzes, James, M.., Posner, Barry, Z..
"Leadership the Challenge Workbook".
San Fransisco:
Jossey-Bass,
2003.
Text.