Gaya APA
World Book-Childcraft International, Inc. (1981).
The World Book Encyclopedia; Research Guide/Index Volume 11 .
london:
World Book-Childcraft International, Inc.
Gaya Chicago
World Book-Childcraft International, Inc.
The World Book Encyclopedia; Research Guide/Index Volume 11.
london:
World Book-Childcraft International, Inc,
1981.
Buku.
Gaya MLA
World Book-Childcraft International, Inc.
The World Book Encyclopedia; Research Guide/Index Volume 11.
london:
World Book-Childcraft International, Inc,
1981.
Buku.
Gaya Turabian
World Book-Childcraft International, Inc.
The World Book Encyclopedia; Research Guide/Index Volume 11.
london:
World Book-Childcraft International, Inc,
1981.
Buku.