Gaya APA
The world book encyclopedia H volume 9. (2007).
Chicago:
World Book.
Gaya Chicago
The world book encyclopedia H volume 9.
9.
Chicago:
World Book,
2007.
Text.
Gaya MLA
The world book encyclopedia H volume 9.
9.
Chicago:
World Book,
2007.
Text.
Gaya Turabian
The world book encyclopedia H volume 9.
Chicago:
World Book,
2007.
Print.