Gaya APA
Encylopedia Americana. (1981).
Chicago:
Grolier.
Gaya Chicago
Encylopedia Americana.
.
Chicago:
Grolier,
1981.
Text.
Gaya MLA
Encylopedia Americana.
.
Chicago:
Grolier,
1981.
Text.
Gaya Turabian
Encylopedia Americana.
Chicago:
Grolier,
1981.
Print.