APA Style
Kouzes, J, M., Posner, B, Z. (2007).
Kouzes dan Posnes The Leadership Challenge (4th ed).
America:
Jossey-Bass.
MLA Style
Kouzes, James, M.., Posner, Barry, Z..
"Kouzes dan Posnes The Leadership Challenge".
4th ed
America:
Jossey-Bass,
2007.
Text.