Gaya APA
Collier's Encyclopedia: Volume 9. (1990).
New York:
Macmillan Educational Company.
Gaya Chicago
Collier's Encyclopedia: Volume 9.
Volume 9.
New York:
Macmillan Educational Company,
1990.
Buku.
Gaya MLA
Collier's Encyclopedia: Volume 9.
Volume 9.
New York:
Macmillan Educational Company,
1990.
Buku.
Gaya Turabian
Collier's Encyclopedia: Volume 9.
New York:
Macmillan Educational Company,
1990.
Buku.