Gaya APA
World Book, Inc. (2007).
The World Book Encyclopedia U-V Volume 20 .
Chicago:
World Book, Inc.
Gaya Chicago
World Book, Inc.
The World Book Encyclopedia U-V Volume 20.
Chicago:
World Book, Inc,
2007.
Teks.
Gaya MLA
World Book, Inc.
The World Book Encyclopedia U-V Volume 20.
Chicago:
World Book, Inc,
2007.
Teks.
Gaya Turabian
World Book, Inc.
The World Book Encyclopedia U-V Volume 20.
Chicago:
World Book, Inc,
2007.
Teks.