APA Style
The world Book Encyclopedia B Volume 2. (1981).
:
.
Chicago Style
The world Book Encyclopedia B Volume 2.
.
:
,
1981.
Text.
MLA Style
The world Book Encyclopedia B Volume 2.
.
:
,
1981.
Text.
Turabian Style
The world Book Encyclopedia B Volume 2.
:
,
1981.
Print.