Gaya APA
Kouzes, J, M., Posner, B, Z.
(2002).
The Leadership Challenge
.
San Fransisco:
Jossey-Bass.
Gaya MLA
Kouzes, James, M., Posner, Barry, Z.
"The Leadership Challenge".
San Fransisco:
Jossey-Bass,
2002.
Buku Tercetak.