APA Style
The World Book Encyclopedia W.X-Y.Z Volume 21. (1972).
Chicago:
Field Enterprises Educational Corporation.
Chicago Style
The World Book Encyclopedia W.X-Y.Z Volume 21.
.
Chicago:
Field Enterprises Educational Corporation,
1972.
Text.
MLA Style
The World Book Encyclopedia W.X-Y.Z Volume 21.
.
Chicago:
Field Enterprises Educational Corporation,
1972.
Text.
Turabian Style
The World Book Encyclopedia W.X-Y.Z Volume 21.
Chicago:
Field Enterprises Educational Corporation,
1972.
Print.