Gaya APA
Encyclopedia Americana. (1982).
U.S.A.:
Grolier Incorporated.
Gaya Chicago
Encyclopedia Americana.
2.
U.S.A.:
Grolier Incorporated,
1982.
Text.
Gaya MLA
Encyclopedia Americana.
2.
U.S.A.:
Grolier Incorporated,
1982.
Text.
Gaya Turabian
Encyclopedia Americana.
U.S.A.:
Grolier Incorporated,
1982.
Print.