Gaya APA
Piening, Christopher. (1997).
Global Europe .
London:
.
Gaya Chicago
Piening, Christopher.
Global Europe.
London:
,
1997.
Text.
Gaya MLA
Piening, Christopher.
Global Europe.
London:
,
1997.
Text.
Gaya Turabian
Piening, Christopher.
Global Europe.
London:
,
1997.
Print.