Gaya APA
The World Book Encyclopedia S-Sn Volume 17. (2007).
Chicago:
World Book Inc..
Gaya Chicago
The World Book Encyclopedia S-Sn Volume 17.
.
Chicago:
World Book Inc.,
2007.
Text.
Gaya MLA
The World Book Encyclopedia S-Sn Volume 17.
.
Chicago:
World Book Inc.,
2007.
Text.
Gaya Turabian
The World Book Encyclopedia S-Sn Volume 17.
Chicago:
World Book Inc.,
2007.
Print.