Gaya APA
Encyclopedia of Knowledge: Volume 18. (1991).
Danbury, Connecticut:
Grolier Incorporated.
Gaya Chicago
Encyclopedia of Knowledge: Volume 18.
18.
Danbury, Connecticut:
Grolier Incorporated,
1991.
Buku.
Gaya MLA
Encyclopedia of Knowledge: Volume 18.
18.
Danbury, Connecticut:
Grolier Incorporated,
1991.
Buku.
Gaya Turabian
Encyclopedia of Knowledge: Volume 18.
Danbury, Connecticut:
Grolier Incorporated,
1991.
Buku.