Gaya APA
Kouzes, J, M., Posner, B, Z.
(2003).
The Leadership Challenge
(
Ed.3)
.
USA:
Jossey-Bass.
Gaya MLA
Kouzes, James, M., Posner, Barry, Z.
"The Leadership Challenge".
Ed.3
USA:
Jossey-Bass,
2003.
Text.