Gaya APA
World Book, Inc.. (2007).
The world book encyclopedia : P volume 15 .
Chicago:
World Book, Inc.
Gaya Chicago
World Book, Inc..
The world book encyclopedia : P volume 15.
Chicago:
World Book, Inc,
2007.
Text.
Gaya MLA
World Book, Inc..
The world book encyclopedia : P volume 15.
Chicago:
World Book, Inc,
2007.
Text.
Gaya Turabian
World Book, Inc..
The world book encyclopedia : P volume 15.
Chicago:
World Book, Inc,
2007.
Print.