Gaya APA
Beck, C Robert. (1990).
Motivation Theories and Principles (edisi 3).
America:
Publication Data.
Gaya Chicago
Beck, C Robert.
Motivation Theories and Principles.
edisi 3
America:
Publication Data,
1990.
Text.
Gaya MLA
Beck, C Robert.
Motivation Theories and Principles.
edisi 3
America:
Publication Data,
1990.
Text.
Gaya Turabian
Beck, C Robert.
Motivation Theories and Principles.
edisi 3
America:
Publication Data,
1990.
Print.