Gaya APA
Tracy, Brian. (2013).
Motivation .
America:
AMACOM.
Gaya Chicago
Tracy, Brian.
Motivation.
America:
AMACOM,
2013.
Text.
Gaya MLA
Tracy, Brian.
Motivation.
America:
AMACOM,
2013.
Text.
Gaya Turabian
Tracy, Brian.
Motivation.
America:
AMACOM,
2013.
Print.