Gaya APA
Leadership Development. (2005).
Alexandria:
ASTD Press.
Gaya Chicago
Leadership Development.
.
Alexandria:
ASTD Press,
2005.
Text.
Gaya MLA
Leadership Development.
.
Alexandria:
ASTD Press,
2005.
Text.
Gaya Turabian
Leadership Development.
Alexandria:
ASTD Press,
2005.
Print.