Gaya APA
THE WORLD BOOK ENCYCLOPEDIA, U-V Volume 20. (2006).
:
.
Gaya Chicago
THE WORLD BOOK ENCYCLOPEDIA, U-V Volume 20.
2006.
:
,
2006.
Encyclopedia.
Gaya MLA
THE WORLD BOOK ENCYCLOPEDIA, U-V Volume 20.
2006.
:
,
2006.
Encyclopedia.
Gaya Turabian
THE WORLD BOOK ENCYCLOPEDIA, U-V Volume 20.
:
,
2006.
Encyclopedia.