Gaya APA
Extreme Sports. (2008).
England:
Penguin Books.
Gaya Chicago
Extreme Sports.
.
England:
Penguin Books,
2008.
Printed Book.
Gaya MLA
Extreme Sports.
.
England:
Penguin Books,
2008.
Printed Book.
Gaya Turabian
Extreme Sports.
England:
Penguin Books,
2008.
Printed Book.