Gaya APA
The World Book Encyclopedia. (2007).
Chicago:
[s.n.].
Gaya Chicago
The World Book Encyclopedia.
.
Chicago:
[s.n.],
2007.
Text.
Gaya MLA
The World Book Encyclopedia.
.
Chicago:
[s.n.],
2007.
Text.
Gaya Turabian
The World Book Encyclopedia.
Chicago:
[s.n.],
2007.
Print.