Gaya APA
The World Book Encyclopedia (W-X-Y-Z Volume 21 Publish 1976). (1976).
USA:
Field Enterprises Educational Corporation.
Gaya Chicago
The World Book Encyclopedia (W-X-Y-Z Volume 21 Publish 1976).
vol.21, 1976.
USA:
Field Enterprises Educational Corporation,
1976.
Text.
Gaya MLA
The World Book Encyclopedia (W-X-Y-Z Volume 21 Publish 1976).
vol.21, 1976.
USA:
Field Enterprises Educational Corporation,
1976.
Text.
Gaya Turabian
The World Book Encyclopedia (W-X-Y-Z Volume 21 Publish 1976).
USA:
Field Enterprises Educational Corporation,
1976.
Print.