Gaya APA
Grolier Universal Encyclopedia Volume 20 (U-Z). (1970).
New York:
Grolier Incorporated.
Gaya Chicago
Grolier Universal Encyclopedia Volume 20 (U-Z).
Volume 20 (U-Z), 1970.
New York:
Grolier Incorporated,
1970.
Text.
Gaya MLA
Grolier Universal Encyclopedia Volume 20 (U-Z).
Volume 20 (U-Z), 1970.
New York:
Grolier Incorporated,
1970.
Text.
Gaya Turabian
Grolier Universal Encyclopedia Volume 20 (U-Z).
New York:
Grolier Incorporated,
1970.
Print.