Gaya APA
THE WORLD BOOK ENCYCLOPEDIA, W-X-Y-Z Volume 21. (2006).
:
.
Gaya Chicago
THE WORLD BOOK ENCYCLOPEDIA, W-X-Y-Z Volume 21.
2006.
:
,
2006.
Encyclopedia.
Gaya MLA
THE WORLD BOOK ENCYCLOPEDIA, W-X-Y-Z Volume 21.
2006.
:
,
2006.
Encyclopedia.
Gaya Turabian
THE WORLD BOOK ENCYCLOPEDIA, W-X-Y-Z Volume 21.
:
,
2006.
Encyclopedia.