Gaya APA
Godefroy, Christian H.. (1990).
The Power Talk System .
London:
Piatkus.
Gaya Chicago
Godefroy, Christian H..
The Power Talk System.
London:
Piatkus,
1990.
Text.
Gaya MLA
Godefroy, Christian H..
The Power Talk System.
London:
Piatkus,
1990.
Text.
Gaya Turabian
Godefroy, Christian H..
The Power Talk System.
London:
Piatkus,
1990.
Print.