Gaya APA
Heldon, Sidney. (2001).
The Sky Is Falling .
London:
Harper Coll.Pub.
Gaya Chicago
Heldon, Sidney.
The Sky Is Falling.
London:
Harper Coll.Pub,
2001.
Text.
Gaya MLA
Heldon, Sidney.
The Sky Is Falling.
London:
Harper Coll.Pub,
2001.
Text.
Gaya Turabian
Heldon, Sidney.
The Sky Is Falling.
London:
Harper Coll.Pub,
2001.
Print.