APA Style
The World Book Encyclopedia, Volume --20 U - V. (2007).
America:
The world book Inc.
Chicago Style
The World Book Encyclopedia, Volume --20 U - V.
Volume --20.
America:
The world book Inc,
2007.
.
MLA Style
The World Book Encyclopedia, Volume --20 U - V.
Volume --20.
America:
The world book Inc,
2007.
.
Turabian Style
The World Book Encyclopedia, Volume --20 U - V.
America:
The world book Inc,
2007.
.